13 The Mark on the Door (1967):🕵🏻Vintage Hardy Boys Book (var.)
21 The Clue of the Broken Blade (1942): var. Hardy Boys Book
The Hardy Boys Detective Handbook🕵🏻Vintage Hardy Boys Book
The Hardy Boys Volume 1 The Tower Treasure
04 The Missing Chums (1962):🕵🏻Vintage Hardy Boys Book
06 The Shore Road Mystery (1928):🕵🏻Vintage Hardy Boys Book
09 The Great Airport Mystery (1961):🕵🏻Vintage Hardy Boys Book
12 Footprints Under the Window (1933):🕵🏻Vintage Hardy Boys Book
12 Footprints Under the Window (1965):🕵🏻Vintage Hardy Boys Book
14 The Hidden Harbor Mystery (Blue Bar):🕵🏻Vintage Hardy Boys Book
15 The Sinister Signpost (Blue Bar):🕵🏻Vintage Hardy Boys Book
23 The Melted Coins (1944):🕵🏻Vintage Hardy Boys Book
27 The Secret of Skull Mountain (1948):🕵🏻Vintage Hardy Boys Book
28 The Sign of the Crooked Arrow (1949):🕵🏻Vintage Hardy Boys Book
30 The Wailing Siren Mystery (1968):🕵🏻Vintage Hardy Boys Book
34 The Hooded Hawk Mystery (1954):🕵🏻Vintage Hardy Boys Book
35 The Clue in the Embers (1972):🕵🏻Vintage Hardy Boys Book
38 The Mystery at Devil's Paw (1959):🕵🏻Vintage Hardy Boys Book
53 The Clue of the Hissing Serpent (1974):🕵🏻Vintage Hardy Boys Book
56 The Jungle Pyramid (1977):🕵🏻Vintage Hardy Boys Book
