- "America's War on Drugs" (2019)
- "Hidden Hitler" (2012)
- "The Boys of '33: FDR's First White House Secret Service Detail" (2008)
- "In the Name of God" (2006)
- "Operation Thunderbolt" (2005)
- "The Brotherhood" (2004)
- "The Third Man: John Carradine's Life in Film" (2003)
- "The Man Behind the Myth: An Investigation Into the Mystery Surrounding Dr. Death" (2001)
- "The First Jewish Detective" (1998)
- "Jackpot: The 5-Million-Dollar Lottery Murder" (1996)
- "Hitler's Last Days: The Plot to Save Hitler" (1994)
- "The JFK Myth" (1993)
- "Who Killed JFK?" (1992)
Fiction Books:
- "The Berlin Conspiracy" (2015)
- "Killing Hitler" (2013)
- "Hitler's Last Plot: The Dark Tale of SS-Colonel Otto Skorzeny" (2011)
- "The Shadow War: The Secret Wars of Osama Bin Laden, Yasser Arafat, and Saddam Hussein" (2009)
- "The Boys in the Cave" (2007)
- "The Death Artist" (2002)