Walton, Calder: - Calder Walton is one of the world's leading scholars of intelligence and national security. An historian at Harvard's Kennedy School of Government, he received a doctorate in history from Trinity College, Cambridge, where he also helped to write MI5's authorized hundred-year history. He is general editor of the three-volume Cambridge History of Espionage and Intelligence. His previous book, Empire of Secrets, won the Longman-History Today Book of the Year award. His research has appeared in leading academic journals and in print and broadcast media on both sides of the Atlantic. He lives in Cambridge, Massachusetts, with his wife and son, who teaches him the true nature of subterfuge.