The Mystery of the Yellow Room is one of the first locked room mystery crime fiction novels written by the author of The Phantom of the Opera (ISBN: 9781909676657). It is the first novel starring fictional detective Joseph Rouletabille, and concerns a complex and seemingly impossible crime in which the criminal appears to disappear from a locked room. Agatha Christie admired the novel and in her early years said she would like to try writing such a book.