Peter Laprade
Greenmantle, published in 1916, is a very riveting war thriller with Hannay and a group of cohorts that are first introduced in this novel attempt to stop Germany from being able to rouse the Middle East into a fervor using an Muslim holy man. With only 3 vaguely worded clues, Hannay and his friends try make their way east. Buchan is really good at this kind of thriller and the characters here are unforgettable. Very good read.