Hardy Boys Book Lot of 6 Vintage 60s 70s Hardcover Mysteries Franklin Dixon

Hardy Boys Books Mysteries lot of 6 Hardcover 1962 to 1978 Give your child a taste of what you or even your grandfather would have read! 1) Secret of the Old Mill #3 1962 2) The Mark on the Door #13 1967 3) The Sinister Sign Post #15 (copyright 1936) 4) The Haunted Fort #44 1965 5) The Mysterious Caravan #54 1975 6) The Firebird Rocket #57 1978 Mild normal wear for the age