Franklin W Dixon

SUMMARY: While investigating some strange happenings in Shantytown which they think may be connected with a bank robber, the Hardy boys attempt to rescue their two kidnapped friends and become kidnap victims.

SUMMARY: During their search for members of a notorious gang responsible for a payroll robbery, Joe and Frank Hardy encounter timber wolves, a blizzard and a mine cave-in.

SUMMARY: Frank and Joe Hardy find themselves trapped in a sinister house of mystery from which there seems to be no escape.

When the Hardy boys agree to help some friends look for an old family treasure with a cryptic message written by a Pilgram ancestor as the only clue to its whereabouts, their job is complicated when their friends are accused of stealing cars and then disappear.

Suspecting that their friend has been swindled, the Hardy brothers investigate and find themselves on the trail of a much larger criminal operation. Frank and Joe Hardy suspect that their best friend Chet Morton is the victim of a summer school swindle and offer to help get his money back. While probing a baffling burglary at the Seneca Indian Reservation in New York State they investigate Zoar College located nearby. Clues that Frank and Joe uncover...

While searching for the guard end of a broken saber that will solve one mystery, the Hardy brothers become involved with a gang of bank robbers.

An archaeological expedition in the West turns into a desperate attempt to capture robbers and an escaped convict.

SUMMARY: When their father is engaged by an experimental race car and motor designer to investigate a series of mysterious accidents, Frank and Joe become involved.

After the new hydrofoil they are guarding is stolen, the Hardy boys face frequent danger in solving a mystery involving criminals who operate by signs of the zodiac.

The search for missing gold takes the Hardy boys to the Yucatán Peninsula where they uncover a second mystery.