British writer John Buchan's Greenmantle is the second of five adventure novels to star Richard Hannay, a man with a remarkable knack for getting out of sticky situations, and indeed getting into them in the first place. During the First World War, amid news of an uprising in the the Islamic world, Hannay must make the dangerous journey through enemy territory into Constantinople, in order to foil a German plot to use religion to dominate

Recently returned from South Africa, adventurer Richard Hannay is bored with life, but after a chance encounter with an American who informs him of an assassination plot and is then promptly murdered in Hannay's London flat, he becomes the obvious suspect and is forced to go on the run. He heads north to his native Scotland, fleeing the police and his enemies. Hannay must keep his wits about him if he is to warn the government before all is too