They Came to Baghdad was first published by the Collins Crime club in 1951. This edition was published for The Thriller Book Club by Willmer Brothers and Co. The Thriller Book Club was part of the large Foyles Book Shops owned by William and Gilbert Foyle. The adress given for The Thriller Book club is 121 Charing Cross Road, London, W.C.2 (nextdoor to Foyles bookshop).
The back cover states that members of the bookclub could buy booked published at 8/6, 10/6 and 12/6 for 3/6 each.