Ngaio Marsh 
Enter a Murderer [EPUB ebook] 

A policeman in the audience sees an all-too-real death scene on a London stage: "Good enough to satisfy the most critical reader of detective stories." -The New York Times Inspector Roderick Alleyn has been invited to an opening night, a new play in which two characters quarrel and then struggle for a gun, with predictably sad results. Even sadder, the gun was not, in fact, loaded with blanks. And when it comes to interviewing witnesses, actors can be a deceptive lot . . ."It’s time to start comparing Christie to Marsh instead of the other way around." -New York Magazine