"From the Searchlight Books: Spy Secrets series (4 titles), this volume deals with spies and secret messages. Peterson organizes the subject into four chapters covering the use of disguise, hidden places and messages, codes and ciphers, and technological advances in cryptology. Examples are drawn from varied time periods, primarily during wartime, beginning with the American Revolution. Two full-page 'Meet a Spy' features profile African American singer-dancer Josephine Baker, who spied for the Allies during WWII, and carrier pigeon Cher Ami, who delivered vital information to an Allied base during WWI. Throughout the book, clearly reproduced color photos and portrait paintings provide glimpses of people, places, and artifacts mentioned in the text. The last page features a message for readers to decode. A handsome introduction to a perennially appealing topic."--Booklist.