Collection of Nancy Drew and Hardy Boys Books

$3 each or $20 for all. Vintage: This lot includes several Nancy Drew Mystery Stories by Carolyn Keene and a Hardy Boys book. Titles visible include 'The Mystery of the Ivory Charm', 'The Secret of the Wooden Lady', 'The Witch Tree Symbol', 'The Hidden Window Mystery', 'The Invisible Intruder', 'By the Light of the Study Lamp', and 'The Great Airport Mystery'. There's also a Bobbsey Twins book.