Partners in Crime is a short story collection by British writer Agatha Christie, first published by Dodd, Mead and Company in the US in 1929 and in the UK by William Collins, Sons on 16 September of the same year. The US edition retailed at $2.00 and the UK edition at seven shillings and sixpence (7/6). All of the stories in the collection had previously been published in magazines (see First publication of stories below) and feature her detectives Tommy and Tuppence Beresford, first introduced in The Secret Adversary (1922).