The Secret Panel

The Hardy Boys embark on two thrilling adventures in this collection. In the first mystery, they try to solve the disappearance of a wealthy man who vanished while sailing to his private island, with only an old pirate's tale about a secret treasure and a secret panel as a clue. In the second mystery, Frank and Joe assist a stranger who has had an accident with his car and claims to be John Mead, owner of a nearby estate. However, when the Hardy boys find an odd-looking house key and discover that John Mead died five years ago, they are drawn into a mystery involving a deserted mansion with doors that have no visible knobs or keylocks. The link between their father’s case of thieves and the mysterious Mead mansion adds to the suspense and keeps the reader on edge.