For students of the Great War the Middle Eastern campaigns represent an eclectic mixture of excitement and romantic notions of great religious passion, and in Greenmantle Buchan takes us on a riveting romp through German-occupied Europe in a race against time to prevent a German sponsored Jihad rousing Muslim opinion against the Entente. Written in 1915 to reflect very real contemporary fears of a Jihad and the security of the British Empire, which was governed largely on prestige factors, Buchan has woven a fantastic tale which transports the Great War student back in time and makes him feel as if he riding with the cavalry into Erzerum at the end of the book. Wonderfully realistic, with the breadth of knowledge displayed by Buchan betraying his later role as Director of Propaganda in 1917.