Breuer, well known for his campaign histories of World War II, turns to the unconventional. His reliance, too often uncritical, on primarily British sources gives the work a one-sided tone, but German successes are not neglected. And any shortcomings in the work's perspective are more than balanced by its unsurpassed scope. Not just a series of cloak-and-dagger narratives, Breuer's "secret war" covers electronics and espionage, dummy airfields and double agents, and much, much more. Breuer compares these operations and integrates them into the war's general history in a way that makes this book welcome alike to general readers and scholars.