This great novel of masked danger and secrecy sees the original adventure hero Richard Hannay on a perilous mission - one that could change the outcome of the First World War. His assignment is to infiltrate the Muslim world, where the Germans are planning to deploy their greatest secret weapon: the mysterious "Greenmantle".
The trail of the enigmatic Islamic Messiah takes him on a wild chase through war-torn Europe, from Constantinople to the Russian border. At the dark heart of the mystery lie the grotesque Stumm, evil femme fatale Hilda von Einem, and the elusive Greenmantle himself . . .
Inspired by John Buchan's real-life work for British intelligence services, 'Greenmantle' is the original thriller, and one of the most terrifying novels of war and international espionage ever written.