Peter Cheyney 
The Stars are Dark [EPUB ebook] 

Quayle, the master of a British spy ring in World War II, is faced with the task of dealing with a man who has come from Morocco with what he says is important information about German troops there. But is the man what he seems? Quayle puts his agents into action, not hesitating to risk their lives to discover the answer, but it is Quayle who ends up doing most of the work—and who is prepared to sacrifice everything for the cause of war.

Cheyney does an excellent job of conveying the world of spying, with all its twists and double crosses. No one is what he seems, and everyone knows that; but no one is sure just what anyone else really is. Quayle tells his people no more than they need to know.

Readers of John Le Carre and William Haggard would recognize Cheyney’s world at once. —mysteryfile.com.