Le Mystère de la Chambre Jaune (English: The Mystery of the Yellow Room) by Gaston Leroux is amongst the first locked-room mysteries, and played a part in inspiring the young Agatha Christie. Reporter Joseph ‘Rouletabille’ investigates an attack on Mademoiselle Stangerson, who has been beaten with a mutton bone and left for dead. One of the first locked-room mystery novels, it was first published serially in France in the periodical L'Illustration from September 1907 to November 1907, then in its own right in 1908.
It is the first book in the Joseph Rouletabille series.