14 The Hidden Harbor Mystery (1961):🕵🏻Vintage Hardy Boys Book
15 The Sinister Signpost (1936):🕵🏻Vintage Hardy Boys Book
15 The Sinister Signpost (1967):🕵🏻Vintage Hardy Boys Book
16 A Figure in Hiding (1937):🕵🏻Vintage Hardy Boys Book
16 A Figure in Hiding (Blue Bar):🕵🏻Vintage Hardy Boys Book
17 The Secret Warning (1938):🕵🏻Vintage Hardy Boys Book
17 The Secret Warning (1966):🕵🏻Vintage Hardy Boys Book
18 The Twisted Claw (1939):🕵🏻Vintage Hardy Boys Book
18 The Twisted Claw (1969):🕵🏻Vintage Hardy Boys Book
19 The Disappearing Floor (1964):🕵🏻Vintage Hardy Boys Book
19 The Disappearing Floor (Blue Bar):🕵🏻Vintage Hardy Boys Book
20 The Mystery of the Flying Express (1941):🕵🏻Vintage Hardy Boys Book
20 The Mystery of the Flying Express (1970):🕵🏻Vintage Hardy Boys Book
21 The Clue of the Broken Blade (1942):🕵🏻Vintage Hardy Boys Book
21 The Clue of the Broken Blade (1970):🕵🏻Vintage Hardy Boys Book
22 The Flickering Torch Mystery (1943):🕵🏻Vintage Hardy Boys Book
22 The Flickering Torch Mystery (1971):🕵🏻Vintage Hardy Boys Book
23 The Melted Coins (1954):🕵🏻Vintage Hardy Boys Book
23 The Melted Coins (1970):🕵🏻Vintage Hardy Boys Book
24 The Short Wave Mystery (1945):🕵🏻Vintage Hardy Boys Book
