The Secret of Skull Mountain

Blurb

The Secret of Skull Mountain is Volume 27 in the original The Hardy Boys Mystery Stories published by Grosset & Dunlap.
This book was written for the Stratemeyer Syndicate by George Waller Jr. in 1948. Between 1959 and 1973 the first 38 volumes of this series were systematically revised as part of a project directed by Harriet Adams, Edward Stratemeyer's daughter. The original version of this book was shortened to 177 pages in 1966 by David Grambs resulting in two similar stories sharing the same title.