The secret of the caves

This edition has images. Title: The secret of the caves Original Publication: New York, NY: Grosset & Dunlap Publishers, 1929. Note: Wikipedia page about this book: https://en.wikipedia.org/wiki/The_Secret_of_the_Caves Credits: Greg Weeks, Mary Meehan and the Online Distributed Proofreading Team at http://www.pgdp.net Summary: "The Secret of the Caves" by Franklin W. Dixon is a mystery novel written in 1929. When teenager Morgan Todd disappears, Frank and Joe Hardy team up with their...