Dorian Rockwood has written an historical fiction war novel that takes place in the United States and reads like an old movie from the forties. The author uses the lingo of the times throughout the book like "the real McCoy" and "nuts and bolts."  He also mentions some famous gossip columnists named Hedda Hopper and Louella Parsons. This is quite the visual book when he describes the movie studio, the equipment used, Sammy's dressing room, and other scenes. The last two sections, the Author's note and Who Are These People, were a good touch and gave background material to the book. This is one aspect that makes this a good book for 8 to 12 year-old children who might be interested in learning more about this time of World War II. This book could also be used as a language lesson with the use of some of the German phrases that are spoken in the book. Treachery Unmasked is a fast-paced historical novel that reads like a detective movie on television and could be read in a day.