The Haunted Fort

Running on Empty (Hardy Boys Casefiles #36)

The Twin Dilemma

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

Mystery In Rocky Mountain National Park

The Haunted Castle

Demons of the Ocean: Vampirates

Spy School Goes North

The Hardy Boys

The Hardy Boys, Frank and Joe, are invited by a friend to explore a trail reportedly haunted by vampires. As they delve into the mystery, they uncover a network of thieves in a plot that's more sinister than they could ever imagine.

Discover Your Child's Next Read

The Haunted Fort

Franklin W. Dixon, R.H. Tandy, 1964

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

Mystery In Rocky Mountain National Park

Johnson Aaron, 2022

The Haunted Castle

Geronimo Stilton, 2018

Demons of the Ocean: Vampirates

Justin Somper, 2005

Spy School Goes North

Stuart Gibbs, 2023