This set of four hardcover Nancy Drew Mystery Stories, authored by Carolyn Keene, offers riveting tales for mystery enthusiasts. Durable editions with iconic yellow spines ensure long-lasting quality. Titles include "The Secret Of The Old Clock," "The Clue Of The Dancing Puppet," "The Spider Sapphire Mystery," and "The Invisible Intruder." • Hardcover editions with yellow spines • Includes four classic mystery titles • Published by Grosset & Dunlap in various decades. • Compact and durable for collectors • Printed in the USA Minor wear on corners and edges of covers. One book has a name written on inside cover. Top to bottom = 7.5 inches.