Who Killed Roger Ackroyd?

Who Killed Roger Ackroyd? (Published with two different under titles: The Mystery Behind the Agatha Christie Mystery or The Murderer Who Eluded Hercule Poirot and Deceived Agatha Christie) (Original French title Qui a tué Roger Ackroyd?) is a 1998 essay by Pierre Bayard, a professor of Literature and psychoanalyst.

He argues that Dr Sheppard isn’t the murderer in the novel The Murder of Roger Ackroyd, and presents his own solution to the case.