Set of 4 Vintage Hardy Boys Books by Franklin W. Dixon, 20-23, 1970 & 1971

This set of 4 vintage Hardy Boys books by Franklin W. Dixon is a must-have for any literature and fiction collector. Published by Grosset & Dunlap, these hardcover books cover topics ranging from mystery to adventure, featuring the beloved Hardy Boys character family. The books are in great shape and will make a wonderful addition to any book collection. The set includes books 20-23, published in 1970 and 1971, and are perfect for fans of the Hardy Boys or collectors of vintage books.