Five The Hardy Boys books, all hardbound, all have some edge wear, one book has writing on first page.
The Secret of the Old Mill, 1962
Hunting For Hidden Gold, Copyright 1928, no printing date
The Mystery of the Aztec Warrior, 1964
The Haunted Fort, 1965, has writing on first page, and a couple of tears, and some spots
The Short-Wave Mystery, copyright 1972, #24, some edge wear.
I do not ship outside the lower 48 states.