A celebrated English stage actor must prove an ingénue innocent of murder in this classic Golden Age mystery. A touring troupe of actors has come to the English village of Peridu to stage a play featuring promising young star Martella Baring. But its not the show that has everyone talking after Martella is found beside the body of the troupe mangers wife . . . Actor and theater owner Sir John Saumarez recommended Martella for her role. So when he hears the news of the grisly murder, he rushes to Martellas trial. Hes convinced the actress is innocent, but the jury believes otherwise. Enlisting the help of his friendsstage manager Nello Markham and his wife, DoucieSir John races to save Martella from the gallows and thrust the real killer into the spotlight . . . Originally published in 1928, Enter Sir John was adapted into the 1930 British feature film Murder!, co-written and directed by Alfred Hitchcock.