The book "The Secret of the Hidden Room" written by Marion Harvey is an exciting detective story that entangles the reader in an intriguing storyline. In this novel you will meet a unique combination of mystery, tension and unexpected turns of events. The heroes of the book make efforts to solve the secret of the hidden room, which contains information about the tragic events of the past. Will they be able to solve the mystery of the world hidden behind the door of this mysterious room? We invite you on an exciting journey into the world of a terrible mystery, where every turn of events will bring new discoveries and confusion.