Book 49

Dirty Deeds

by Franklin W. Dixon

Published 1 January 1991
In this story, the Hardy brothers visit the wild west, where gold fever is running high and lives are at stake. By the author of Power Play.

Book 51


Book 52


Book 54

Mysterious Caravan

by Franklin W. Dixon

Published 1 April 1975

Book 55

Witchmaster's Key

by Franklin W. Dixon

Published 16 June 1980

Book 56

Height of Danger

by Franklin W. Dixon

Published 1 January 1991
Frank and Joe find themselves in Austria at the World Snowboarding Championships, where the number-one competitor is the number-one target and sabotage is the name of the game.

Book 56


Book 59

Night of the Werewolf

by Franklin W. Dixon

Published 1 January 1979

Book 60

A Japanese business tycoon mysteriously disappears and, soon after, a rare samurai sword is stolen from an art gallery. Suspecting a connection, the Hardy boys try to solve the mystery.

Book 61

The Pentagon Spy

by Franklin W. Dixon

Published 1 May 1980

Book 62

The Apeman's Secret

by Franklin W. Dixon

Published 1 January 1980
A "monster" who terrorizes Bayport and a girl who runs away to join a cult are the subjects of the Hardy boys' sleuthing.

Book 63

Mummy Case

by Franklin W. Dixon

Published 1 January 1980
Called in to investigate the theft of some statuettes stolen from the Eygptian Museum in New York, the Hardy brothers become involved in a deepening mystery which includes the possible overthrow of another country's government.

Book 64

The art collector who suspects the Hardy boys of stealing one of his valuable paintings offers them a chance to prove their innocence by hiring them to find the painting and the real culprits.

Book 65

The Stone Idol

by Franklin W. Dixon

Published December 1980
Their search for an Easter Island idol takes the Hardy boys to Easter Island and on to investigate the theft of government material in Antarctica.

Book 66


Book 67

The Outlaw's Silver

by Franklin W. Dixon

Published 1 January 1981
The Hardy Boys are given clues which send them in search of the treasure hidden by the Outlaw of the Pine Barrens.

Book 67

The Outlaw Silver

by Franklin W. Dixon

Published 1 October 1988

Book 68

Deadly Chase

by Franklin W. Dixon

Published 1 December 1986

Book 68

Submarine Caper

by Franklin W. Dixon

Published 1 October 1981

Book 69

Four-headed Dragon

by Franklin W. Dixon

Published 1 October 1981
The Hardy boys track a criminal who plans to use an invention designed as a peaceful aid to the secret Four-Headed Dragon organization behind the Iron Curtain to harm the free world instead.