The Mark on the Door

The Hardy Boys Secret Files Collection Books 1-5

The Twin Dilemma

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)

Nancy Drew: #5,43

Benny Uncovers a Mystery

The Absent Author (A to Z Mysteries)

The Hardy Boys

Two teenage brothers, Frank and Joe Hardy, embark on an adventurous mission to solve a mystery surrounding a hissing serpent, with their intelligence and bravery.

Problem-Solving

Adventure

Courage

Friendship

Family And Relationships

The Clue of the Hissing Serpent

Discover Your Child's Next Read

The Mark on the Door

Franklin W. Dixon, 1934

The Hardy Boys Secret Files Collection Books 1-5

Franklin W. Dixon, Scott Burroughs, 2014

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

Franklin W. Dixon, 1997

Nancy Drew: #5,43

Carolyn Keene, 1994

Benny Uncovers a Mystery

Gertrude Chandler Warner, Gertrude Warner, David Cunningham, 1976

The Absent Author (A to Z Mysteries)

John Steven Gurney, Roy Ron, 1997