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A blind peddler's warning and a glass eye plunge Frank and Joe Hardy into a baffling case.

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The owner of a gold pharaoh's head claims it was aboard the freighter Katawa, but suspicions arise that he is trying to defraud the shipping line's insurance company.

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When their father asks for help tracking a jewel thief, the Hardy boys find that the trail leads them back to their own hometown. There, they begin a new investigation of a mysterious death which occurred many years ago.

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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.

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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.

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Suspecting that their friend has been swindled, the Hardy brothers investigate and find themselves on the trail of a much larger criminal operation.

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The theft of a collection of stuffed animals from a country auction draws Frank and Joe Hardy into a thrilling mystery.

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A chance meeting with a stranger on the road provides the Hardy brothers with a clue to a gang of local burglars.

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The Hardy brothers embark on a freighter trip under mysterious circrcumstances and find themselves involved with a smuggling ring.

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The Hardys team up with a team of engineers to discover how water is disappearing from Bayport's new reservoir near Skull Mountain.

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The Hardy brothers interrupt their investigations of jewelry-store holdups to answer a plea from their cousin on a New Mexico cattle ranch.

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The Hardy brothers accept the challenge of vindicating a Confederate general accused of stealing hidden gold which belonged to a a bank.

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Stranded by a sudden storm at sea, the Hardy boys discover a wallet containing two thousand dollars. Upon returning home, they learn that a truck loaded with rifles has been stolen. Even though the two events seem unrelated, they are but the first clues in a complex mystery.

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The Hardy boys follow a thief to a Native American village. There, the residents ask for the boys' help in recovering the deed to their land before the land is claimed by strangers.

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In solving the mystery of two medallions missing from an inherited curio collection, the Hardys wind up in a desolate area of Guatemala at the mercy of dangerous thugs.

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Hired to locate an old Spanish cannon, the Hardy brothers uncover an even greater treasure after perilous underwater adventures.

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A cryptic note from their father leads the Hardy boys to the Caribbean where they must solve the mystery, but only if they can successfully evade the henchmen who are trailing them.

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When they journey to Alaska to help a friend who feels his life is in danger, the Hardy brothers find their own lives threatened.

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Originally published by Simon & Schuster in 1960.

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The Hardy boys travel to Mexico to solve the mystery of a missing plane and its passengers. Their only clues are giant desert drawings made by Native Americans hundreds of years ago.

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The Hardy boys go to the Pocono Mountains to help a friend of their father find out what is behind the mysterious happenings at Black Hollow. In the process they help their father solve a case involving a ring of thieves.

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The Hardy boys find mystery in the Canadian Northwest when a carved rune stone left by Vikings is found near Great Slave Lake.

(Hardback)

Originally published by Simon & Schuster, c1965.