48 The Arctic Patrol Mystery (1969):🕵🏻Vintage Hardy Boys Book
49 The Bombay Boomerang (1970):🕵🏻Vintage Hardy Boys Book
50 Danger on Vampire Trail (1971):🕵🏻Vintage Hardy Boys Book
51 The Masked Monkey (1972):🕵🏻Vintage Hardy Boys Book
07 The Secret of the Caves (1964):🕵🏻Vintage Hardy Boys Book
52 The Shattered Helmet (1973):🕵🏻Vintage Hardy Boys Book
54 The Mysterious Caravan (1975):🕵🏻Vintage Hardy Boys Book
55 The Witchmaster's Key (1955):🕵🏻Vintage Hardy Boys Book
57 The Firebird Rocket (1978):🕵🏻Vintage Hardy Boys Book
58 The Sting of the Scorpion (1979):🕵🏻Vintage Hardy Boys Book
