09 The Great Airport Mystery (1965-BE):🕵🏻Vintage Hardy Boys Book Blue-Bac
08 The Mystery of Cabin Island (1966-CAM):🕵🏻Vintage Hardy Boys Book Blue Back
08 The Mystery of Cabin Island (1966-YN):🕵🏻Vintage Hardy Boys Book Blu
53 The Clue of the Hissing Serpent (1974-YN): Hardy Boys Book Blue Back
51 The Masked Monkey (1972-RN):🕵🏻Vintage Hardy Boys Book Blue-Back
50 Danger on Vampire Trail (1971-YN):🕵🏻Vintage Hardy Boys Book Blue-Back
49 The Bombay Boomerang (1970-YN):🕵🏻Vintage Hardy Boys Book Blue-Back
48 The Arctic Patrol Mystery (1969-YN):🕵🏻Vintage Hardy Boys Book Blue-Back
47 The Mystery of the Whale Tattoo (1968-YN):🕵🏻 Hardy Boys Book Blue Back
39 The Mystery of the Chinese Junk (1960-BE):🕵🏻Vintage Hardy Boys Book Bl
38 The Mystery at Devil's Paw (1959-BE):🕵🏻Vintage Hardy Boys Book Blue-Back
37 The Ghost at Skeleton Rock (1966-YN):🕵🏻Vintage Hardy Boys Book Blue-Back
18 The Twisted Claw (1969-YN):🕵🏻Vintage Hardy Boys Book Blue-Back
33 The Yellow Feather Mystery (1953/1971-RN):🕵🏻Vintage Hardy Boys Book Black
45 The Mystery of the Spiral Bridge (1966-YN):🕵🏻Vintage Hardy Boys Book Back
17 The Secret Warning (1966):🕵🏻Vintage Hardy Boys Book Blue-Back
07 The Secret of the Caves (1964-YN):🕵🏻Vintage Hardy Boys Book Blue-Back
46 The Secret Agent on Flight 101 (1967-YN):🕵🏻Vintage Hardy Boys Book Blu
27 The Secret of Skull Mountain (1966-YN):🕵🏻Vintage Hardy Boys Book Blue-
23 The Melted Coins (1970-RN):🕵🏻Vintage Hardy Boys Book Blue-Back
