“Top Secret Exchange: The Tizard Mission and the Scientific War” by David Zimmerman is a hardcover textbook published by McGill-Queen’s University Press in 1996. The book delves into the history and political science surrounding the Tizard Mission, focusing on intelligence and espionage during World War II. With 272 pages, this book offers a detailed exploration of this significant event in Canadian history, making it a valuable resource for those interested in the subject area.