Third Girl by Agatha Christie in Paperback

 

A confused young woman suspects she may have committed murder... Three unmarried women lived together in a London apartment. The first was a secretary, the second was an artist, and the third, who turned to Poirot for assistance, vanished under the belief that she was a killer. Rumors of guns, knives, and bloodstains circled, but without solid proof, it would require Poirot's determination to determine whether the third woman was guilty, innocent, or suffering from insanity...