Hardcover, 8vo, 511 pages, map (on lining papers) , 21 cm. They Used Dark Forces is a World War II fictional novel by Dennis Wheatley. The hero, Gregory Sallust, finds himself in Nazi Germany and associated with a black magician who is advising Adolf Hitler. They supposedly persuade him to commit suicide rather than to fight to the last, in the belief that he will be reincarnated among a population of Aryan warriors living on Mars (! ) SUBJECT(S) : Descriptor: World War, 1939-1945 -- Fiction. Dust Jacket in very good condition. Light wear to binding. Excellent condition. Beautiful copy. (Holo2-71-5)