They Do It with Mirrors is a detective fiction novel by British writer Agatha Christie, first published in the US by Dodd, Mead and Company in 1952 under the title of Murder with Mirrors and in UK by the Collins Crime Club on 17 November that year under Christie's original title. The US edition retailed at $2.50 and the UK edition at ten shillings and sixpence (10/6). The book features her detective Miss Marple.