The Sinister Signpost

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)

Doublecross Mission Hindenburg

The Black Island - Classic Colour Edition

Mystery at Dead End Farm

The Mystery of the Fire Dragon

The Hardy Boys

Sky Sabotage is a thrilling adventure tale that follows amateur detectives Frank and Joe Hardy as they undertake a daring mission to unravel the mysterious events occurring at an aviation company. Their investigation takes them deep into a world of high-stakes espionage and danger.

Discover Your Child's Next Read

The Sinister Signpost

Franklin W. Dixon, 1936

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

Doublecross Mission Hindenburg

Alexander London, 2015

The Black Island - Classic Colour Edition

Hergé, 1943

Mystery at Dead End Farm

Mary C. Jane, 1978

The Mystery of the Fire Dragon

Carolyn Keene, 1961