The Secret of Skull Mountain

The Hardy Boys Secret Files Collection Books 1-5

Danger Overseas (Nancy Drew: Girl Detective and Hardy Boys: Undercover Brothers Super Mystery #2)

The Gross Ghost Mystery (Frank and Joe Hardy: The Clues Brothers #1)

The Clue of The Whistling Bagpipes

Lost Treasure of the Emerald Eye

Legend of the Star Runner: A Timmi Tobbson Adventure

Good Work Secret Seven

The Hardy Boys

In this exciting adventure, two young brothers, Frank and Joe Hardy, embark on a dangerous journey to unravel the mystery behind their father's disappearance. They find themselves trapped at sea on a perilous journey encountering hidden treasure, shady villains, and dangerous weather conditions.

Discover Your Child's Next Read

The Secret of Skull Mountain

Franklin W. Dixon, 1948

The Hardy Boys Secret Files Collection Books 1-5

Franklin W. Dixon, Scott Burroughs, 2014

Danger Overseas (Nancy Drew: Girl Detective and Hardy Boys: Undercover Brothers Super Mystery #2)

Franklin W. Dixon, Carolyn Keene, 2008

The Gross Ghost Mystery (Frank and Joe Hardy: The Clues Brothers #1)

Franklin W. Dixon, 1997

The Clue of The Whistling Bagpipes

Carolyn Keene, 1964

Lost Treasure of the Emerald Eye

Elisabetta Dami, Geronimo Stilton, 2000

Legend of the Star Runner: A Timmi Tobbson Adventure

J Wagner, 2018

Good Work Secret Seven

Enid Blyton, 1954