Anna Green is the founder of the police novel and the master of the classic detective puzzle. The novel "Who is the killer?" - one of the writer’s masterpieces. This work has everything you can expect from a detective story: a fascinating plot, exciting intrigue and an unexpected denouement. Old man Leavenworth, a successful entrepreneur and millionaire, was killed in a huge New York mansion. During the investigation, one of his nieces, Eleanor, becomes the main suspect. Unwittingly drawn into the investigation, the young lawyer Raymond, confident of the girl’s innocence, tries to divert suspicion from her. Joining forces with detective Grice, he begins to unravel the threads leading to the real criminal.