Edward Powys Mathers (1892–1939) introduced the cryptic crossword to Britain in 1926 through the pages of the Observer. Known as Torquemada, he was acknowledged as a brilliant translator and a critic specialising in crime fiction. In 1934 he published a selection of his puzzles under the title The Torquemada Puzzle Book – the final hundred pages of which contained the novel-cum-puzzle Cain’s Jawbone. His true identity was only revealed when he died in 1939, and this selection of Torquemada’s best crosswords was originally published in 1942.