Download or read book Hardy Boys 25: The Secret Panel written by Franklin W. Dixon and published by Penguin. This book was released on 1946-01-01 with total page 193 pages. Available in PDF, EPUB and Kindle. Book excerpt: Another exciting mystery begins for Frank and Joe when they help a stranger who has had an accident with his car. The man introduces himself as John Mead, owner of a nearby estate. But when the Hardy boys find an odd-looking house key and try to return it, they realize that John Mead died five years ago! They are even more amazed when they find that the intricately carved doors in the deserted mansion have no visible knobs or keylocks. What happens when Frank and Joe discover that there is a link between their father’s case of thieves and the mysterious Mead mansion will keep the reader on edge with thrills and suspense.