Catlos, Brian A. Infidel kings and Unholy Warriors : Faith, Power, and Violence in the age of Crusade and Jihad / Brian A. Catlos. - 1st ed. - New York : Farrar, Straus and Giroux, 2015. - xvii, 390 p. : ill. ISBN: 9780809058372 Subjects--Topical Terms: Crusades--History