The Jungle Pyramid

Running on Empty (Hardy Boys Casefiles #36)

The Twin Dilemma

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

The Mystery of the Shrinking House

Mr Penguin and the Lost Treasure

Good Work Secret Seven

Cigars of the Pharaoh (Tintin Young Readers)

The Hardy Boys

Frank and Joe Hardy, the famous young detective brothers, are drawn into a new mystery surrounding Skull Mountain, where strange lights and eerie sounds are rumored to come from. The brothers uncover a secret cave in the mountain and a series of mysteries that they must solve.

Discover Your Child's Next Read

The Jungle Pyramid

Franklin W. Dixon, 1976

Running on Empty (Hardy Boys Casefiles #36)

Franklin W. Dixon, 1993

The Twin Dilemma

Franklin W. Dixon, Carolyn Keene, 1993

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

Franklin W. Dixon, Carolyn Keene, 2008

The Mystery of the Shrinking House

Jack Hearne, Alfred Hitchcock, William Arden, 1972

Mr Penguin and the Lost Treasure

Alex T. Smith, Alice Delarbre, 2017

Good Work Secret Seven

Enid Blyton, 1954

Cigars of the Pharaoh (Tintin Young Readers)

Herge Au, 1955