The Apemans Secret

DEAD SEASON

The Twin Dilemma

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

The Mystery of the Singing Ghost

The Mystery of the Flaming Footprints

P.K. Pinkerton and the Petrified Man

Agaton Sax and the Diamond Thieves

The Hardy Boys

The Hardy Boys set out to solve the mystery of a wealthy man who vanished while sailing to his private island. The only clue is an old pirate's tale about a secret treasure and a secret panel.

Discover Your Child's Next Read

The Apemans Secret

Franklin W. Dixon, 1980

DEAD SEASON

Franklin W. Dixon, 1990

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 Singing Ghost

Gertrude Chandler Warner, Gertrude Warner, 1992

The Mystery of the Flaming Footprints

M. V. Carey, Mary Carey, 1971

P.K. Pinkerton and the Petrified Man

Caroline Lawrence, 2012

Agaton Sax and the Diamond Thieves

Nils-Olof Franzén, 1959