<I>The Mystery of the Yellow Room</I> is Gaston Leroux's masterpiece and it turned out to be his most successful book during his lifetime. It is one of the classics of early-twentieth-century detective fiction.<br><br><br><br>At the heart of the novel is this enigma: how could a murder take place inside a locked room that shows no sign of being entered? The novel is also about the rivalry between the detective Frederick Larson and a young investigative journalist Rouletabille to solve the case. Larson finds a suspect who is put on trial only to have him cleared by Rouletabille who reveals in the most dramatic fashion the identity of the real murderer.<br><br><br><br>This atmospheric thriller is still a favorite of whodunit fans everywhere.