King of the Khyber Rifles by MUNDY, Talbot

Athelstan King is a British Secret Agent stationed in India at the beginning of WWI. He is attached to the Khyber Rifles regiment as a cover, but his real job is to prevent a holy war. To stop a holy war single-handed would be rather like stopping the wind--possibly easy enough, if one knew the way. King is ordered to work with a mysterious and powerful Eastern woman, Yasmini. Can King afford to trust her? Can he afford not to? Introduction by Brett W. Downey