The Murder of Roger Ackroyd is a mystery novel by the British writer Agatha Christie, her third to feature Hercule Poirot as the lead detective. The novel was published in the UK in June 1926 by William Collins, Sons, having previously been serialised as Who Killed Ackroyd? between July and September 1925 in the London Evening News. An American edition by Dodd, Mead and Company followed in 1926.