Bodyguard of Lies is a 1975 non-fiction book written by Anthony Cave Brown, his first major historical work. Named for a wartime quote of Winston Churchill, it is a narrative account of Allied military deception operations during the Second World War. The British and American governments resisted Brown's attempts to research the book. Many of the topics were still classified and he was denied access to British war records. The material in the book is predominantly based on oral testimony as well as some American records, declassified toward the end of Brown's research.