Vintage Hardy Boys 12-Book Collection – Blue Spine Editions (Grosset & Dunlap)

Grab this lot of 12 vintage Hardy Boys Mystery Stories hardcover books by Franklin W. Dixon! These are the classic 1960s “blue spine” editions (no dust jackets, as issued) from Grosset & Dunlap – perfect for collectors or young mystery lovers. Titles included (with their original series number):    •   #3 The Secret of the Old Mill (1927)    •   #4 The Missing Chums (1928)    •   #10 What Happened at Midnight (1931)    •   #14 The Hidden Harbor Mystery (1935)    •   #16 A Figure in Hiding (1937)    •   #17 The Secret Warning (1938)    •   #23 The Melted Coins (1944)    •   #45 The Mystery of the Spiral Bridge (1965)    •   #52 The Shattered Helmet (1973) Condition: All books are in fair used condition – no original dust jackets (illustrated matte blue covers with spine artwork). Expect general wear: scuffing on covers, softened/bumped corners, and some spine wear. All bindings intact and pages legible. These are vintage used books, so some page yellowing or minor marks may be present, but they remain great reading copies and display pieces. Keywords: vintage books, Hardy Boys collection, classic children’s mystery novels, collectible books, Franklin W. Dixon, Grosset & Dunlap, blue spine Hardy Boys, retro teen mystery series