This title examines the role of espionage during World War II, focusing on the extensive training, clever tools, and dangerous missions that enabled spies and saboteurs to contribute to the war effort. Compelling narrative text and well-chosen historical photographs and primary sources make this book perfect for report writing. Features include a glossary, a selected bibliography, websites, source notes, and an index, plus a timeline and essential facts. Aligned to Common Core Standards and correlated to state standards. Essential Library is an imprint of Abdo Publishing, a division of ABDO.