The Mystery of the Hidden Room is a mystery novel with detective Graydon McKelvie. Ruth Darwin, a former fiancée of Carlton Davies, was blackmailed into leavin

This was the author's maiden novel and it introduced the amateur detective, Graydon McKelvie, to the reading public. This mystery novel involves a hidden room,

DigiCat Publishing presents to you this special edition of "The Mystery of the Secret Room" by Enid Blyton. DigiCat Publishing considers every written word to b

Four children tasked with searching Professor Barton's large house for a valuable book hidden in a secret room discover they are not the only ones sleuthing.

The gang discover a long hidden room full of secrets at their aunt's house, including a locked treasure chest.