The Secret Panel

Blurb

The Secret Panel is Volume 25 in the original The Hardy Boys Mystery Stories published by Grosset & Dunlap.
This book was written for the Stratemeyer Syndicate by Harriet S. Adams in 1946. 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 in 1969 by Priscilla Baker-Carr resulting in two slightly different stories sharing the same title.