The Shattered Helmet

Running on Empty (Hardy Boys Casefiles #36)

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 Scarlet Slipper Mystery

The Mystery of the Singing Serpent

Nancy Drew and the Clue Crew Series

Nancy Drew Starter Set - Books 1-5

The Hardy Boys

The Hardy Boys, Frank and Joe, are on another adventure. This time they're investigating the disappearance of a collection of rare coins, which leads them to a dangerous gang of criminals.

Discover Your Child's Next Read

The Shattered Helmet

Franklin W. Dixon, 1973

Running on Empty (Hardy Boys Casefiles #36)

Franklin W. Dixon, 1993

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 Scarlet Slipper Mystery

Carolyn Keene, 1954

The Mystery of the Singing Serpent

Ed Vebell, M. V. Carey, Mary Carey, 1972

Nancy Drew and the Clue Crew Series

Carolyn Keene, 2015

Nancy Drew Starter Set - Books 1-5

Carolyn Keene, 1930