WANTLIST
PC Revised Test: 17 18 20 22 23 24 28 30 31 32 33 34 35 36 37 39 41 42 44 45 48 49 50 51 52 53 54 55 56 57 58
PC Original Text: 3 4 5 6 7 8 9 10 12 13 15 16 17 19 24 25 26 28 29 30 31 32 33 34 35 36 37 38
DJ Revised Text: 1 2 11 14 39 40
DJ Original Text: 1 3 4 5 6 7 8 9 10 12 15 16 17 18 21 22 23 25 26 27 31 32 33 34 35 36 37 38
WANT
1. The Tower Treasure 1927-DJ 1959-DJ
2. The House on the Cliff 1927-DJ 1959-DJ
3. The Secret of the Old Mill 1927-DJ 1927-PC
4. The Missing Chums 1928-DJ 1928-PC
5. Hunting for Hidden Gold 1928-DJ 1928-PC 1963-PC
6. The Shore Road Mystery 1928-DJ 1928-PC
7. The Secret of the Caves 1929-DJ 1929-PC 1964-PC
8. The Mystery of Cabin Island 1929-DJ 1929-PC 1966-PC
9. The Great Airport Mystery 1930-DJ 1930-PC
10. What Happened at Midnight 1931-DJ 1931-PC 1967-PC
11. While the Clock Ticked 1932-DJ 1932-PC 1962-DJ
12. Footprints Under the Window 1933-DJ 1933-PC
13. The Mark on the Door 1934-DJ 1934-PC 1967-PC
14. The Hidden Harbor Mystery 1935-DJ 1961-DJ 1961-PC
15. The Sinister Signpost 1936-DJ 1936-PC 1968-PC
16. A Figure in Hiding 1937-DJ 1937-PC
17. The Secret Warning 1938-DJ 1938-PC 1966-PC
18. The Twisted Claw 1939-DJ 1969-PC
19. The Disappearing Floor 1940-DJ 1940-PC
20. (The) Mystery of the Flying Express 1941-DJ 1970-PC
21. The Clue of the Broken Blade 1942-DJ 1942-PC
22. The Flickering Torch Mystery 1943-DJ 1971-PC
23. The Melted Coins 1944-DJ 1970-PC
24. The Short-Wave Mystery 1945-DJ 1945-PC 1966-PC
25. The Secret Panel 1946-DJ 1946-PC
26. The Phantom Freighter 1947-DJ 1947-PC 1970-PC
27. The Secret of Skull Mountain 1948-DJ 1966-PC
28. The Sign of the Crooked Arrow 1949-DJ 1949-PC 1970-PC
29. The Secret of the Lost Tunnel 1950-DJ 1950-PC
30. The Wailing Siren Mystery 1951-DJ 1951-PC 1968-PC
31. The Secret of Wildcat Swamp 1952-DJ 1952-PC 1969-PC
32. The Crisscross Shadow 1953-DJ 1953-PC 1969-PC
33. The Yellow Feather Mystery 1953-DJ 1953-PC 1971-PC
34. The Hooded Hawk Mystery 1954-DJ 1954-PC 1971-PC
35. The Clue in the Embers 1955-DJ 1955-PC 1972-PC
36. The Secret of Pirates' Hill 1956-DJ 1956-PC 1972-PC
37. The Ghost at Skeleton Rock 1957-DJ 1957-PC 1966-PC
38. (The) Mystery at Devil's Paw 1959-DJ 1959-PC
39. The Mystery of the Chinese Junk 1960-DJ 1960-PC
40. Mystery of the Desert Giant 1961-DJ
41. The Clue of the Screeching Owl 1962-PC
42. The Viking Symbol Mystery 1963-PC
43. The Mystery of the Aztec Warrior
44. The Haunted Fort 1965-PC
45. The Mystery of the Spiral Bridge 1966-PC
46. The Secret Agent on Flight 101
47. Mystery of the Whale Tattoo
48. The Arctic Patrol Mystery 1969-PC
49. The Bombay Boomerang 1970-PC
50. Danger on Vampire Trail 1971-PC
51. The Masked Monkey 1972-PC
52. The Shattered Helmet 1973-PC
53. The Clue of the Hissing Serpent 1974-PC
54. The Mysterious Caravan 1975-PC
55. The Witchmaster's Key 1976-PC
56. The Jungle Pyramid 1977-PC
57. The Firebird Rocket 1978-PC
58. The Sting of the Scorpion 1979-PC
Detective Handbook 1959-DJ 1959-PC 1972-PC
Checklist - Hardy Boys Canon
1. The Tower Treasure
1927: The Tower Mansion has been robbed and the father of a friend is under suspicion. The boys discover the real thief and track down the loot. (214 pages)
1959: Completely rewritten, but follows same basic plot. (180 pages)
2. The House on the Cliff
1927: The boys crack a smuggling ring operating out of an old house on the cliffs of Barmet Bay and rescue their captured father in the process. (212 pages)
1959: Completely rewritten, but follows same basic plot. (180 pages)
3. The Secret of the Old Mill
1927: Counterfeit money is circulating in Bayport! The boys track down the counterfeiting gang at their base in an old mill. (212 pages)
1962: Completely rewritten; old counterfeiting plot retained, but new subplot involving sabotage of U.S. missile development added. (174 pages)
4. The Missing Chums
1928: Chet and Biff are kidnapped and held for ransom by a gang of bank robbers, who mistakenly believe they are holding Frank and Joe. (214 pages)
1962: Completely rewritten, but many plot elements retained. (175 pages)
5. Hunting for Hidden Gold
1928: The boys head to Montana to track down a buried stash of gold. (214 pages)
1963: Completely rewritten, but many plot elements retained. (177 pages)
6. The Shore Road Mystery
1928: The boys clear their friend's name and defeat a gang of car thieves operating in the Shore Road area by using a Trojan Horse maneuver. (212 pages)
1964: Completely rewritten; car-theft plot retained, but new subplot involving long-lost treasure added. (178 pages)
7. The Secret of the Caves
1929: A woman asks the boys to track down her missing brother, whom they discover is suffering from amnesia and living as a hermit in the caves near Bayport. (210 pages)
1964: Completely rewritten; missing-man story retained as a subplot, but new main plot involves sabotage of a radar station. (175 pages)
8. The Mystery of Cabin Island
1929: The boys solve the mystery of a missing stamp collection while camping on an island in Barmet Bay during their Christmas vacation. (214 pages)
1966: Completely rewritten, but most plot elements retained. (178 pages)
9. The Great Airport Mystery
1930: The boys are framed for air-mail theft and must solve the case to clear their names. (210 pages)
1965: Completely rewritten; new plot involves the theft of valuable electronics and the ghost of a pilot presumed killed in the Caribbean. (175 pages)
10. What Happened at Midnight
1931: Joe is kidnapped as the clock strikes midnight; after his rescue, the boys travel to New York in pursuit of a ring of diamond smugglers. (213 pages)
1967: Completely rewritten; some plot elements retained, but new main plot involves the theft of a valuable invention. (173 pages)
11. While the Clock Ticked
1932: The boys discover how and why Raymond Dalrymple is receiving threatening notes in a secret room of the old Purdy mansion. (213 pages)
1962: Completely rewritten; most plot elements retained, but a different villain is added. (174 pages)
12. Footprints Under the Window
1933: The boys crack a human trafficking ring smuggling illegal Chinese immigrants into America. (218 pages)
1965: Completely rewritten; a couple of plot elements are retained, but the illegal immigrants are now refugees from South America and the main plot centres on the planned theft of a top-secret satellite camera. (177 pages)
13. The Mark on the Door
1934: The boys go to Mexico with their father in search of a missing witness in a court case involving fradulent oil stocks. (219 pages)
1967: Completely rewritten; many plot elements retained. (175 pages)
14. The Hidden Harbor Mystery
1935: In the course of solving a robbery for which they were unjustly accused, the boys go to the South and end a long-standing family feud, solving a case for their father in the process. (219 pages)
1961: Completely rewritten; only the central element of a family feud in the South is retained. (177 pages)
15. The Sinister Signpost
1936: The boys track down a stolen racehorse and save Bayport from destruction by the madman Vilnoff. (215 pages)
1968: Completely rewritten; two elements (a stolen racehorse and an evil inventor) are retained, but the plot is otherwise completely different, involving the theft of top-secret racecar engine plans. (175 pages)
16. A Figure in Hiding
1937: The boys foil the "Eye Syndicate", a gang run by the phony eye surgeon Doc Grafton.
1965: Completely rewritten; some themes and characters from the original are adapted into the completely different plot, which involves a theft ring and a facility offering plastic surgery to criminals.
17. The Secret Warning
1938: While searching for a million dollars' worth of treasure in a sunken ship, the boys must deal with unscrupulous diver Gus Kuntz. (212 pages)
1966: Completely rewritten; the idea of treasure in a sunken ship is retained, but is now part of an insurance fraud plot. (176 pages)
18. The Twisted Claw
1939: The boys go undercover on a pirate ship to defeat the "Twisted Claw" smugglers and reveal their island stronghold. (217 pages)
1969: Completely rewritten; many plot elements retained. (177 pages)
19. The Disappearing Floor
1940: The boys help to bring a gang of bank robbers to justice. (218 pages)
1966: Completely rewritten; some plot elements retained. (176 pages)
20. Mystery of the Flying Express
1941: The boys foil a foreign spy training operation using the "Flying Express" train. (217 pages)
1970: Completely rewritten, with no plot elements retained from the original; the new story involves the disappearance of the "Flying Express" hydrofoil. (177 pages)
21. The Clue of the Broken Blade
1942: The boys solve a series of truck thefts and locate Arthur Barker's stolen swords. (218 pages)
1969: Completely rewritten; some plot elements are retained, but the new story involves a gang of bank robbers who are searching for the missing half of a sword belonging to the family of the Hardy Boys' fencing instructor. (178 pages)
22. The Flickering Torch Mystery
1943: While working at an experimental farm, the boys investigate the disappearance of valuable silkworms and the theft of government building materials. (212 pages)
1971: Completely rewritten, with no plot elements retained from the original; the new story centres on a scheme involving smuggled uranium isotopes. (181 pages)
23. The Melted Coins
1944: After receiving an amnesiac's warning about the "Curse of the Caribbees," the boys foil a gang that is stealing valuable coins and melting them down for counterfeit. (215 pages)
1970: Completely rewritten, with no plot elements retained from the original; the new story involves a summer-school scam and the theft of a sacred Seneca mask. (180 pages)
24. The Short-Wave Mystery
1945: An investigation into stolen radio parts leads the boys to northern Canada, where they locate a group of missing scientists. (217 pages)
1966: Completely rewritten; some plot elements are retained, but the new story involves industrial espionage and taxidermy. (176 pages)
25. The Secret Panel
1946: The boys' search for a kidnapped doctor leads them to a mysterious mansion whose doors have no visible knobs or locks. (212 pages)
1969: Minor revisions. (178 pages)
26. The Phantom Freighter
1947: While attempting to arrange a cruise on a freighter for an eccentric stranger, the boys stumble upon a ring of smugglers and forgers who are holding scientists captive on a mysterious ship. (216 pages)
1970: Minor revisions. (181 pages)
27. The Secret of Skull Mountain
1948: The boys avert a crisis when they discover the reason why water is disappearing from a new reservoir in Bayport. (212 pages)
1966: Minor revisions. (177 pages)
28. The Sign of the Crooked Arrow
1949: The boys travel to their cousin's ranch in New Mexico and crack a ring of thieves who knock out their victims using gas hidden in cigarettes. (214 pages)
1970: Minor revisions. (178 pages)
29. The Secret of the Lost Tunnel
1950: The boys go to the South to solve a Civil War mystery involving a Confederate general's alleged theft of gold. (210 pages)
1968: Minor revisions. (178 pages)
30. The Wailing Siren Mystery
1951: The boys discover that Central American revolutionaries are hiding stolen equipment and munitions in the North Woods of Bayport. (214 pages)
1968: Minor revisions. (177 pages)
31. The Secret of Wildcat Swamp
1952: In the West, the boys crack a gang of train robbers, nab an escaped convict, and recover a missing deed. (212 pages)
1969: Minor revisions. (178 pages)
32. The Crisscross Shadow
1953: The boys search for the deed to a Native reservation while tangling with a gang of saboteurs. (213 pages)
1969: Minor revisions. (177 pages)
33. The Yellow Feather Mystery
1953: The search for a missing will takes the boys to Woodson Academy, where they unmask a dangerous villain. (216 pages)
1971: Minor revisions. (181 pages)
34. The Hooded Hawk Mystery
1954: With help from a trained peregrine falcon, the boys bring a gang of people-smugglers to justice and rescue a captive Indian prince. (212 pages)
1971: Minor revisions. (180 pages)
35. The Clue in the Embers
1955: A clue in a curio collection brings the boys to Guatemala, where they foil a plot to steal national treasures. (214 pages)
1972: Minor revisions. (177 pages)
36. The Secret of Pirates' Hill
1956: Hired to locate an old Spanish cannon, the boys encounter dangerous criminals as they dive for the sunken treasure. (213 pages)
1972: Minor revisions. (178 pages)
37. The Ghost at Skeleton Rock
1957: A cryptic message from their father brings the boys to the Caribbean, where they foil a plot involving a Cuban revolution and an atomic bomb. (184 pages)
1966: Minor revisions. (177 pages)
38. Mystery at Devil's Paw
1959: Tony Prito asks the boys to help him in Alaska, where his party has been attacked by a gang who turn out to be searching for a lost moon rocket. (183 pages)
1973: Very minor revisions. (180 pages)
39. The Mystery of the Chinese Junk
1960: The Hardys and Chet get more than they bargain for when they buy a Chinese junk that turns out to contain a hidden treasure. (184 pages)
40. Mystery of the Desert Giant
1961: The boys head to the California desert to rescue a missing industrialist and foil a clever plot to defraud the US government. (182 pages)
41. The Clue of the Screeching Owl
1962: In the Pocono Mountains, the boys search for their father's missing friend and solve the mystery of the purportedly haunted Black Hollow. (177 pages)
42. The Viking Symbol Mystery
1963: The boys head to Canada's Northwest Territories in search of a stolen Viking runestone, and foil a group of thieves in the process. (175 pages)
43. The Mystery of the Aztec Warrior
1964: A handwritten will sends the boys on a series of adventures in Mexico in a hunt for the descendant of an Aztec warrior. (178 pages)
44. The Haunted Fort
1965: Chet asks the boys to help solve the theft of valuable paintings in New England, which leads to a hunt for a valuable gold chain in an eerie fort. (176 pages)
45. The Mystery of the Spiral Bridge
1966: Saboteurs have kidnapped Fenton Hardy, and the boys must rescue their father while foiling a plot to blow up a bridge in Kentucky. (177 pages)
46. The Secret Agent on Flight 101
1967: A magician who turns out to be the head of an international gang kidnaps Fenton Hardy, and the search for their father leads the boys to foil a jewel heist. (176 pages)
47. Mystery of the Whale Tattoo
1968: A traveling carnival and a valuable artifact lead the boys to a mysterious gang whose members each bear a special tattoo. (174 pages)
48. The Arctic Patrol Mystery
1969: In Iceland searching for a man who is owed a reward, the boys come across a plot to foil the US moon project. (176 pages)
49. The Bombay Boomerang
1970: Investigating thefts of mercury shipments, the boys uncover a sinister plot to release nerve gas and overthrow the US government. (180 pages)
50. Danger on Vampire Trail
1971: The boys and their friends go camping in the Rockies and track down a credit-card forgery ring. (175 pages)
51. The Masked Monkey
1972: The search for the son of a wealthy industrialist takes the boys to Brazil and helps them to bring an identity fraud gang to justice. (178 pages)
52. The Shattered Helmet
1973: While searching for a priceless ancient Greek helmet, the boys help their father to crack an international crime syndicate. (180 pages)
53. The Clue of the Hissing Serpent
1974: A stolen chess trophy and a mysterious hot-air balloon lead the boys to Hong Kong on the trail of an international crime ring. (181 pages)
54. The Mysterious Caravan
1975: The boys' discovery of an ancient bronze death mask in Jamaica leads to adventures in North Africa. (182 pages)
55. The Witchmaster's Key
1976: In the British Isles to investigate a robbery, the boys must contend with a coven of witches. (179 pages)
56. The Jungle Pyramid
1977: The search for stolen gold bullion takes the boys to Switzerland and Mexico. (180 pages)
57. The Firebird Rocket
1978: Fenton Hardy enlists his sons to search for a missing rocket scientist in Australia. (180 pages)
58. The Sting of the Scorpion
1979: As their father investigates a gang of terrorists, the boys find clues in an airship company and a newly-opened zoo. (180 pages)
The Hardy Boys Detective Handbook
1959: in consultation with Captain D. A. Spina
1972: in consultation with Special Agent William F. Flynn
Links
The Hardy Boys Unofficial Home Page: hardyboys.us/hbos.htm
The Hardy Boys Online: www.hardyboysonline.net/
Hardy Boys Wikipedia: en.wikipedia.org/wiki/The_Hardy_Boys
PC Revised Test: 17 18 20 22 23 24 28 30 31 32 33 34 35 36 37 39 41 42 44 45 48 49 50 51 52 53 54 55 56 57 58
PC Original Text: 3 4 5 6 7 8 9 10 12 13 15 16 17 19 24 25 26 28 29 30 31 32 33 34 35 36 37 38
DJ Revised Text: 1 2 11 14 39 40
DJ Original Text: 1 3 4 5 6 7 8 9 10 12 15 16 17 18 21 22 23 25 26 27 31 32 33 34 35 36 37 38
WANT
1. The Tower Treasure 1927-DJ 1959-DJ
2. The House on the Cliff 1927-DJ 1959-DJ
3. The Secret of the Old Mill 1927-DJ 1927-PC
4. The Missing Chums 1928-DJ 1928-PC
5. Hunting for Hidden Gold 1928-DJ 1928-PC 1963-PC
6. The Shore Road Mystery 1928-DJ 1928-PC
7. The Secret of the Caves 1929-DJ 1929-PC 1964-PC
8. The Mystery of Cabin Island 1929-DJ 1929-PC 1966-PC
9. The Great Airport Mystery 1930-DJ 1930-PC
10. What Happened at Midnight 1931-DJ 1931-PC 1967-PC
11. While the Clock Ticked 1932-DJ 1932-PC 1962-DJ
12. Footprints Under the Window 1933-DJ 1933-PC
13. The Mark on the Door 1934-DJ 1934-PC 1967-PC
14. The Hidden Harbor Mystery 1935-DJ 1961-DJ 1961-PC
15. The Sinister Signpost 1936-DJ 1936-PC 1968-PC
16. A Figure in Hiding 1937-DJ 1937-PC
17. The Secret Warning 1938-DJ 1938-PC 1966-PC
18. The Twisted Claw 1939-DJ 1969-PC
19. The Disappearing Floor 1940-DJ 1940-PC
20. (The) Mystery of the Flying Express 1941-DJ 1970-PC
21. The Clue of the Broken Blade 1942-DJ 1942-PC
22. The Flickering Torch Mystery 1943-DJ 1971-PC
23. The Melted Coins 1944-DJ 1970-PC
24. The Short-Wave Mystery 1945-DJ 1945-PC 1966-PC
25. The Secret Panel 1946-DJ 1946-PC
26. The Phantom Freighter 1947-DJ 1947-PC 1970-PC
27. The Secret of Skull Mountain 1948-DJ 1966-PC
28. The Sign of the Crooked Arrow 1949-DJ 1949-PC 1970-PC
29. The Secret of the Lost Tunnel 1950-DJ 1950-PC
30. The Wailing Siren Mystery 1951-DJ 1951-PC 1968-PC
31. The Secret of Wildcat Swamp 1952-DJ 1952-PC 1969-PC
32. The Crisscross Shadow 1953-DJ 1953-PC 1969-PC
33. The Yellow Feather Mystery 1953-DJ 1953-PC 1971-PC
34. The Hooded Hawk Mystery 1954-DJ 1954-PC 1971-PC
35. The Clue in the Embers 1955-DJ 1955-PC 1972-PC
36. The Secret of Pirates' Hill 1956-DJ 1956-PC 1972-PC
37. The Ghost at Skeleton Rock 1957-DJ 1957-PC 1966-PC
38. (The) Mystery at Devil's Paw 1959-DJ 1959-PC
39. The Mystery of the Chinese Junk 1960-DJ 1960-PC
40. Mystery of the Desert Giant 1961-DJ
41. The Clue of the Screeching Owl 1962-PC
42. The Viking Symbol Mystery 1963-PC
43. The Mystery of the Aztec Warrior
44. The Haunted Fort 1965-PC
45. The Mystery of the Spiral Bridge 1966-PC
46. The Secret Agent on Flight 101
47. Mystery of the Whale Tattoo
48. The Arctic Patrol Mystery 1969-PC
49. The Bombay Boomerang 1970-PC
50. Danger on Vampire Trail 1971-PC
51. The Masked Monkey 1972-PC
52. The Shattered Helmet 1973-PC
53. The Clue of the Hissing Serpent 1974-PC
54. The Mysterious Caravan 1975-PC
55. The Witchmaster's Key 1976-PC
56. The Jungle Pyramid 1977-PC
57. The Firebird Rocket 1978-PC
58. The Sting of the Scorpion 1979-PC
Detective Handbook 1959-DJ 1959-PC 1972-PC
Checklist - Hardy Boys Canon
1. The Tower Treasure
1927: The Tower Mansion has been robbed and the father of a friend is under suspicion. The boys discover the real thief and track down the loot. (214 pages)
1959: Completely rewritten, but follows same basic plot. (180 pages)
2. The House on the Cliff
1927: The boys crack a smuggling ring operating out of an old house on the cliffs of Barmet Bay and rescue their captured father in the process. (212 pages)
1959: Completely rewritten, but follows same basic plot. (180 pages)
3. The Secret of the Old Mill
1927: Counterfeit money is circulating in Bayport! The boys track down the counterfeiting gang at their base in an old mill. (212 pages)
1962: Completely rewritten; old counterfeiting plot retained, but new subplot involving sabotage of U.S. missile development added. (174 pages)
4. The Missing Chums
1928: Chet and Biff are kidnapped and held for ransom by a gang of bank robbers, who mistakenly believe they are holding Frank and Joe. (214 pages)
1962: Completely rewritten, but many plot elements retained. (175 pages)
5. Hunting for Hidden Gold
1928: The boys head to Montana to track down a buried stash of gold. (214 pages)
1963: Completely rewritten, but many plot elements retained. (177 pages)
6. The Shore Road Mystery
1928: The boys clear their friend's name and defeat a gang of car thieves operating in the Shore Road area by using a Trojan Horse maneuver. (212 pages)
1964: Completely rewritten; car-theft plot retained, but new subplot involving long-lost treasure added. (178 pages)
7. The Secret of the Caves
1929: A woman asks the boys to track down her missing brother, whom they discover is suffering from amnesia and living as a hermit in the caves near Bayport. (210 pages)
1964: Completely rewritten; missing-man story retained as a subplot, but new main plot involves sabotage of a radar station. (175 pages)
8. The Mystery of Cabin Island
1929: The boys solve the mystery of a missing stamp collection while camping on an island in Barmet Bay during their Christmas vacation. (214 pages)
1966: Completely rewritten, but most plot elements retained. (178 pages)
9. The Great Airport Mystery
1930: The boys are framed for air-mail theft and must solve the case to clear their names. (210 pages)
1965: Completely rewritten; new plot involves the theft of valuable electronics and the ghost of a pilot presumed killed in the Caribbean. (175 pages)
10. What Happened at Midnight
1931: Joe is kidnapped as the clock strikes midnight; after his rescue, the boys travel to New York in pursuit of a ring of diamond smugglers. (213 pages)
1967: Completely rewritten; some plot elements retained, but new main plot involves the theft of a valuable invention. (173 pages)
11. While the Clock Ticked
1932: The boys discover how and why Raymond Dalrymple is receiving threatening notes in a secret room of the old Purdy mansion. (213 pages)
1962: Completely rewritten; most plot elements retained, but a different villain is added. (174 pages)
12. Footprints Under the Window
1933: The boys crack a human trafficking ring smuggling illegal Chinese immigrants into America. (218 pages)
1965: Completely rewritten; a couple of plot elements are retained, but the illegal immigrants are now refugees from South America and the main plot centres on the planned theft of a top-secret satellite camera. (177 pages)
13. The Mark on the Door
1934: The boys go to Mexico with their father in search of a missing witness in a court case involving fradulent oil stocks. (219 pages)
1967: Completely rewritten; many plot elements retained. (175 pages)
14. The Hidden Harbor Mystery
1935: In the course of solving a robbery for which they were unjustly accused, the boys go to the South and end a long-standing family feud, solving a case for their father in the process. (219 pages)
1961: Completely rewritten; only the central element of a family feud in the South is retained. (177 pages)
15. The Sinister Signpost
1936: The boys track down a stolen racehorse and save Bayport from destruction by the madman Vilnoff. (215 pages)
1968: Completely rewritten; two elements (a stolen racehorse and an evil inventor) are retained, but the plot is otherwise completely different, involving the theft of top-secret racecar engine plans. (175 pages)
16. A Figure in Hiding
1937: The boys foil the "Eye Syndicate", a gang run by the phony eye surgeon Doc Grafton.
1965: Completely rewritten; some themes and characters from the original are adapted into the completely different plot, which involves a theft ring and a facility offering plastic surgery to criminals.
17. The Secret Warning
1938: While searching for a million dollars' worth of treasure in a sunken ship, the boys must deal with unscrupulous diver Gus Kuntz. (212 pages)
1966: Completely rewritten; the idea of treasure in a sunken ship is retained, but is now part of an insurance fraud plot. (176 pages)
18. The Twisted Claw
1939: The boys go undercover on a pirate ship to defeat the "Twisted Claw" smugglers and reveal their island stronghold. (217 pages)
1969: Completely rewritten; many plot elements retained. (177 pages)
19. The Disappearing Floor
1940: The boys help to bring a gang of bank robbers to justice. (218 pages)
1966: Completely rewritten; some plot elements retained. (176 pages)
20. Mystery of the Flying Express
1941: The boys foil a foreign spy training operation using the "Flying Express" train. (217 pages)
1970: Completely rewritten, with no plot elements retained from the original; the new story involves the disappearance of the "Flying Express" hydrofoil. (177 pages)
21. The Clue of the Broken Blade
1942: The boys solve a series of truck thefts and locate Arthur Barker's stolen swords. (218 pages)
1969: Completely rewritten; some plot elements are retained, but the new story involves a gang of bank robbers who are searching for the missing half of a sword belonging to the family of the Hardy Boys' fencing instructor. (178 pages)
22. The Flickering Torch Mystery
1943: While working at an experimental farm, the boys investigate the disappearance of valuable silkworms and the theft of government building materials. (212 pages)
1971: Completely rewritten, with no plot elements retained from the original; the new story centres on a scheme involving smuggled uranium isotopes. (181 pages)
23. The Melted Coins
1944: After receiving an amnesiac's warning about the "Curse of the Caribbees," the boys foil a gang that is stealing valuable coins and melting them down for counterfeit. (215 pages)
1970: Completely rewritten, with no plot elements retained from the original; the new story involves a summer-school scam and the theft of a sacred Seneca mask. (180 pages)
24. The Short-Wave Mystery
1945: An investigation into stolen radio parts leads the boys to northern Canada, where they locate a group of missing scientists. (217 pages)
1966: Completely rewritten; some plot elements are retained, but the new story involves industrial espionage and taxidermy. (176 pages)
25. The Secret Panel
1946: The boys' search for a kidnapped doctor leads them to a mysterious mansion whose doors have no visible knobs or locks. (212 pages)
1969: Minor revisions. (178 pages)
26. The Phantom Freighter
1947: While attempting to arrange a cruise on a freighter for an eccentric stranger, the boys stumble upon a ring of smugglers and forgers who are holding scientists captive on a mysterious ship. (216 pages)
1970: Minor revisions. (181 pages)
27. The Secret of Skull Mountain
1948: The boys avert a crisis when they discover the reason why water is disappearing from a new reservoir in Bayport. (212 pages)
1966: Minor revisions. (177 pages)
28. The Sign of the Crooked Arrow
1949: The boys travel to their cousin's ranch in New Mexico and crack a ring of thieves who knock out their victims using gas hidden in cigarettes. (214 pages)
1970: Minor revisions. (178 pages)
29. The Secret of the Lost Tunnel
1950: The boys go to the South to solve a Civil War mystery involving a Confederate general's alleged theft of gold. (210 pages)
1968: Minor revisions. (178 pages)
30. The Wailing Siren Mystery
1951: The boys discover that Central American revolutionaries are hiding stolen equipment and munitions in the North Woods of Bayport. (214 pages)
1968: Minor revisions. (177 pages)
31. The Secret of Wildcat Swamp
1952: In the West, the boys crack a gang of train robbers, nab an escaped convict, and recover a missing deed. (212 pages)
1969: Minor revisions. (178 pages)
32. The Crisscross Shadow
1953: The boys search for the deed to a Native reservation while tangling with a gang of saboteurs. (213 pages)
1969: Minor revisions. (177 pages)
33. The Yellow Feather Mystery
1953: The search for a missing will takes the boys to Woodson Academy, where they unmask a dangerous villain. (216 pages)
1971: Minor revisions. (181 pages)
34. The Hooded Hawk Mystery
1954: With help from a trained peregrine falcon, the boys bring a gang of people-smugglers to justice and rescue a captive Indian prince. (212 pages)
1971: Minor revisions. (180 pages)
35. The Clue in the Embers
1955: A clue in a curio collection brings the boys to Guatemala, where they foil a plot to steal national treasures. (214 pages)
1972: Minor revisions. (177 pages)
36. The Secret of Pirates' Hill
1956: Hired to locate an old Spanish cannon, the boys encounter dangerous criminals as they dive for the sunken treasure. (213 pages)
1972: Minor revisions. (178 pages)
37. The Ghost at Skeleton Rock
1957: A cryptic message from their father brings the boys to the Caribbean, where they foil a plot involving a Cuban revolution and an atomic bomb. (184 pages)
1966: Minor revisions. (177 pages)
38. Mystery at Devil's Paw
1959: Tony Prito asks the boys to help him in Alaska, where his party has been attacked by a gang who turn out to be searching for a lost moon rocket. (183 pages)
1973: Very minor revisions. (180 pages)
39. The Mystery of the Chinese Junk
1960: The Hardys and Chet get more than they bargain for when they buy a Chinese junk that turns out to contain a hidden treasure. (184 pages)
40. Mystery of the Desert Giant
1961: The boys head to the California desert to rescue a missing industrialist and foil a clever plot to defraud the US government. (182 pages)
41. The Clue of the Screeching Owl
1962: In the Pocono Mountains, the boys search for their father's missing friend and solve the mystery of the purportedly haunted Black Hollow. (177 pages)
42. The Viking Symbol Mystery
1963: The boys head to Canada's Northwest Territories in search of a stolen Viking runestone, and foil a group of thieves in the process. (175 pages)
43. The Mystery of the Aztec Warrior
1964: A handwritten will sends the boys on a series of adventures in Mexico in a hunt for the descendant of an Aztec warrior. (178 pages)
44. The Haunted Fort
1965: Chet asks the boys to help solve the theft of valuable paintings in New England, which leads to a hunt for a valuable gold chain in an eerie fort. (176 pages)
45. The Mystery of the Spiral Bridge
1966: Saboteurs have kidnapped Fenton Hardy, and the boys must rescue their father while foiling a plot to blow up a bridge in Kentucky. (177 pages)
46. The Secret Agent on Flight 101
1967: A magician who turns out to be the head of an international gang kidnaps Fenton Hardy, and the search for their father leads the boys to foil a jewel heist. (176 pages)
47. Mystery of the Whale Tattoo
1968: A traveling carnival and a valuable artifact lead the boys to a mysterious gang whose members each bear a special tattoo. (174 pages)
48. The Arctic Patrol Mystery
1969: In Iceland searching for a man who is owed a reward, the boys come across a plot to foil the US moon project. (176 pages)
49. The Bombay Boomerang
1970: Investigating thefts of mercury shipments, the boys uncover a sinister plot to release nerve gas and overthrow the US government. (180 pages)
50. Danger on Vampire Trail
1971: The boys and their friends go camping in the Rockies and track down a credit-card forgery ring. (175 pages)
51. The Masked Monkey
1972: The search for the son of a wealthy industrialist takes the boys to Brazil and helps them to bring an identity fraud gang to justice. (178 pages)
52. The Shattered Helmet
1973: While searching for a priceless ancient Greek helmet, the boys help their father to crack an international crime syndicate. (180 pages)
53. The Clue of the Hissing Serpent
1974: A stolen chess trophy and a mysterious hot-air balloon lead the boys to Hong Kong on the trail of an international crime ring. (181 pages)
54. The Mysterious Caravan
1975: The boys' discovery of an ancient bronze death mask in Jamaica leads to adventures in North Africa. (182 pages)
55. The Witchmaster's Key
1976: In the British Isles to investigate a robbery, the boys must contend with a coven of witches. (179 pages)
56. The Jungle Pyramid
1977: The search for stolen gold bullion takes the boys to Switzerland and Mexico. (180 pages)
57. The Firebird Rocket
1978: Fenton Hardy enlists his sons to search for a missing rocket scientist in Australia. (180 pages)
58. The Sting of the Scorpion
1979: As their father investigates a gang of terrorists, the boys find clues in an airship company and a newly-opened zoo. (180 pages)
The Hardy Boys Detective Handbook
1959: in consultation with Captain D. A. Spina
1972: in consultation with Special Agent William F. Flynn
Links
The Hardy Boys Unofficial Home Page: hardyboys.us/hbos.htm
The Hardy Boys Online: www.hardyboysonline.net/
Hardy Boys Wikipedia: en.wikipedia.org/wiki/The_Hardy_Boys