This book was first published in England under the title The Quiet Canadian, but does not contain Ian Fleming's foreword.
- New York: Farrar, Straus, 1963. Hardcover.
- Room 3603. New York: Dell, 1964. Paperback.
- New York: Ballantine, 1977. Paperback.
- Room 3603: The Incredible True Story of Secret Intelligence Operations During World War II. New York: Lyons, 2001. Softcover.