Author of 7 books: "Survivor's Guilt: The Secret Service and the Failure to Protect President Kennedy", "JFK: From Parkland to Bethesda", "The Not-So-Secret Service: Agency Tales from FDR To the Kennedy Assassination to The Reagan Era", "Who's Who in The Secret Service", "Honest Answers About the Murder of President John F. Kennedy", "The Plot to Kill President Kennedy in Chicago" and "President Kennedy Should Have Survived Dallas."