“The Secrets War: Office of Strategic Services in World War II” by George C. Chalou is a comprehensive textbook that delves into the history and political science of military intelligence during WW II. Published in 1992 by the National Archives & Records Administration, this hardcover book spans 376 pages and provides a detailed account of the role of the OSS in espionage and strategic planning. The author’s expertise in the subject area, along with his ability to access classified information, makes this book a valuable resource for those interested in the clandestine operations of the United States during the war.