Gr 4-6--Mitchell has done the secret world of espionage justice with these titles. Filled with illustrations, facts, and true tales, the books cover everything students would want to know about a spy's life. Lies offers a primer on a few of the most famous spies in history. Codes discusses the brilliant ways in which people have disguised messages. Gizmos looks at spy rings, cameras, the Kiss of Death, and cell-phone tracking. Traitors begins with Benedict Arnold and Mata Hari and comes to the present day with Robert Hanssen. Each book has a page about a spy career associated with its topic and includes educational requirements, salary ranges, and a section of resources for more information. Sidebars with more information and extra stories and photos are peppered throughout the volumes. Easy-to-read, informative titles.--Lia Carruthers, Roxbury Public Library, Succasunna, NJ[Page 184]. (c) Copyright 2012. Library Journals LLC, a wholly owned subsidiary of Media Source, Inc. No redistribution permitted.