High Quality Content by WIKIPEDIA articles! Poirot Investigates is a short story collection written by Agatha Christie and first published in the UK by The Bodley Head in March 1924. In the eleven stories, famed eccentric detective Hercule Poirot solves a variety of mysteries involving greed, jealousy and revenge. The American version of this book, published by Dodd, Mead and Company in 1925, featured a further three stories. The UK first edition of the book featured an illustration of Poirot on the dustjacket reprinted from the March 21, 1923 issue of The Sketch magazine by W. Smithson Broadhead.