98 books in series

The Hardy Boys

The Hardy Boys is a 98-book series with 98 primary works first released in 1927 with contributions by Franklin W. Dixon, Jerrold Mundis, and Leslie H. Morrill.

The Tower Treasure
#1PopularFirst

1927 • 35 Readers • 214 pages • 3.5

The House on the Cliff
#2

1927 • 20 Readers • 212 pages • 3.5

Cover 7

The Secret of the Old Mill

#3

1927 • 4 Readers • 3

The Missing Chums
#4

1928 • 7 Readers • 192 pages • 3

Hunting for Hidden Gold
#5

1928 • 9 Readers • 177 pages • 3.7

The Shore Road Mystery
#6

1928 • 7 Readers • 212 pages • 3

The Secret of the Caves
#7

1929 • 4 Readers • 175 pages • 3

The Great Airport Mystery
#9

1930 • 6 Readers • 175 pages • 3

What Happened at Midnight
#10

1931 • 5 Readers • 173 pages • 3

While the Clock Ticked
#11

1932 • 6 Readers • 174 pages • 3.3

Footprints Under the Window
#12

1933 • 4 Readers • 212 pages • 3

The Mark on the Door
#13

1934 • 4 Readers • 192 pages • 3

The Hidden Harbor Mystery
#14

1935 • 4 Readers • 177 pages • 3

A Figure in Hiding (Hardy Boys, #16)
#16

1937 • 4 Readers • 228 pages • 3

The Secret Warning
#17

1938 • 6 Readers • 192 pages • 3

The Twisted Claw
#18

1939 • 8 Readers • 177 pages • 3.4

The Disappearing Floor
#19

1940 • 7 Readers • 192 pages • 3.4

Mystery of the Flying Express
#20

1941 • 4 Readers • 177 pages • 3

The Clue of the Broken Blade
#21

1942 • 5 Readers • 192 pages • 3

The Flickering Torch Mystery
#22

1943 • 4 Readers • 160 pages • 3

The Short-Wave Mystery
#24

1945 • 4 Readers • 192 pages • 3

The Secret Panel
#25

1946 • 7 Readers • 178 pages • 3.3

The Phantom Freighter
#26

1947 • 4 Readers • 181 pages • 3

The Secret of Skull Mountain
#27

1948 • 5 Readers • 192 pages • 3

The Sign of the Crooked Arrow
#28

1949 • 4 Readers • 160 pages • 3

The Wailing Siren Mystery
#30

1951 • 4 Readers • 177 pages • 3

The Secret of Wildcat Swamp
#31

1952 • 5 Readers • 178 pages • 3

The Yellow Feather Mystery
#33

1953 • 5 Readers • 181 pages • 3

The Hooded Hawk Mystery
#34

1954 • 4 Readers • 180 pages • 3

The Clue in the Embers
#35

1955 • 5 Readers • 214 pages • 3

The Secret of Pirates' Hill
#36

1956 • 6 Readers • 178 pages • 3.3

The Ghost at Skeleton Rock
#37

1957 • 5 Readers • 177 pages • 3.3

Mystery at Devil's Paw
#38

1959 • 4 Readers • 180 pages • 3

The Mystery of the Chinese Junk
#39

1959 • 4 Readers • 184 pages • 3

Mystery of the Desert Giant
#40

1960 • 6 Readers • 160 pages • 3.5

The Viking Symbol Mystery
#42

1962 • 4 Readers • 192 pages • 3

The Mystery of the Aztec Warrior
#43

1964 • 6 Readers • 192 pages • 3.7

The Haunted Fort
#44

1964 • 5 Readers • 176 pages • 3

The Mystery of the Spiral Bridge
#45

1965 • 4 Readers • 192 pages • 3

The Secret Agent on Flight 101
#46

1967 • 5 Readers • 192 pages • 2.7

Mystery of the Whale Tattoo
#47

1967 • 4 Readers • 192 pages • 3

The Arctic Patrol Mystery
#48

1969 • 5 Readers • 176 pages • 3.3

The Bombay Boomerang
#49

1970 • 3 Readers • 192 pages • 3

Danger on Vampire Trail
#50

1971 • 4 Readers • 192 pages • 3.3

The Masked Monkey
#51

1972 • 4 Readers • 192 pages • 3

The Shattered Helmet
#52

1973 • 5 Readers • 180 pages • 3.5

The Clue of the Hissing Serpent
#53

1974 • 4 Readers • 192 pages • 3

The Witchmaster's Key
#55

1975 • 3 Readers • 192 pages • 3

The Jungle Pyramid
#56

1976 • 3 Readers • 180 pages • 3

The Firebird Rocket
#57

1978 • 5 Readers • 192 pages • 3

The Sting of the Scorpion
#58

1978 • 3 Readers • 180 pages • 3

Mystery of the Samurai Sword
#60

1979 • 3 Readers • 192 pages • 3

The Pentagon Spy
#61

1980 • 2 Readers • 192 pages • 3

The Apeman's Secret
#62

1980 • 2 Readers • 192 pages • 3

The Mummy Case
#63

1980 • 3 Readers • 192 pages • 3

Mystery of Smugglers Cove
#64

2005 • 3 Readers • 192 pages • 3

The Stone Idol
#65

1981 • 2 Readers • 192 pages • 3

The Vanishing Thieves
#66

1980 • 2 Readers • 192 pages • 3

The Outlaw's Silver
#67

1981 • 1 Reader • 190 pages • 3

The submarine caper
#68

1981 • 1 Reader • 3

Cover 3

The Four-Headed Dragon

#69

1981 • 2 Readers • 3.5

The Infinity Clue
#70

1981 • 1 Reader • 160 pages • 3

Track of the Zombie
#71

1982 • 1 Reader • 160 pages • 3

The Voodoo Plot
#72

1982 • 2 Readers • 189 pages • 4

The Billion Dollar Ransom
#73

1982 • 1 Reader • 189 pages • 3

Tic-Tac-Terror
#74

1984 • 1 Reader • 201 pages • 3

Trapped at Sea
#75

1982 • 1 Reader • 181 pages • 3

Game Plan for Disaster
#76

1982 • 1 Reader • 3

The Crimson Flame
#77

1981 • 2 Readers • 190 pages • 3.5

Cave-In
#78

1983 • 2 Readers • 3.5

Sky Sabotage
#79

1983 • 1 Reader • 160 pages • 3

The Roaring River Mystery
#80

1984 • 1 Reader • 157 pages • 3

The Demon's Den
#81

1984 • 1 Reader • 3

The Blackwing Puzzle
#82

1984 • 1 Reader • 212 pages • 3

The Swamp Monster
#83

1985 • 1 Reader • 192 pages • 3

Revenge Of The Desert Phantom
#84

1985 • 1 Reader • 3

The Skyfire Puzzle
#85

1985 • 1 Reader • 160 pages • 3

The Mystery of the Silver Star
#86

1987 • 1 Reader • 151 pages • 3

Program for Destruction
#87

1987 • 1 Reader • 180 pages • 3

Tricky Business
#88

1988 • 1 Reader • 160 pages • 3

Sky Blue Frame
#89

1988 • 1 Reader • 154 pages • 3

Danger on the Diamond
#90

1993 • 1 Reader • 148 pages • 3

Shield of Fear
#91

1988 • 1 Reader • 153 pages • 3

The Shadow Killers
#92

1988 • 1 Reader • 154 pages • 3

The Serpent's Tooth Mystery
#93

1988 • 1 Reader • 10 pages • 3

Breakdown in Axeblade
#94

1989 • 1 Reader • 150 pages • 3

Wipeout
#96

1989 • 1 Reader • 149 pages • 3

Cast of Criminals
#97

1989 • 1 Reader • 152 pages • 3

The Alaskan Adventure
#138

1996 • 1 Reader

The Secret of Skeleton Reef
#144

1997 • 1 Reader

Cover 3

The Crisscross Crime

#150

1998 • 1 Reader

Cover 2

Danger in the Extreme

#152

1998 • 1 Reader

Cover 2

The Lure of the Italian Treasure

#157

1999 • 1 Reader

In Plane Sight
#176

2002 • 2 Readers • 160 pages • 4

Cover 8

Passport to Danger

#179

2003 • 1 Reader

The Secret of the Soldier's Gold
#182

2003 • 1 Reader • 160 pages • 4

Cover 5

The Dangerous Transmission

#184

2004 • 1 Reader • 4

Motocross Madness
#190

2005 • 1 Reader • 160 pages • 4