* A Choice of Weapons (1982)
* 36 Hours: A Navy Carrier Battle Group Makes War in the Persian Gulf (1995)
* Cutting Edge: Technology, Information, Capitalism and Its Future (1998)
* Sacred Grove: The Druid Revival and the Ancient Religion of the West (2004)
* Gods on Earth: Secret Rulers of the World (2006)
* The Box: How the Shipping Container Made the World Smaller and the World Economy Bigger (2007)
* Shadow Government (2011)
* Fisa: How Roosevelt and His New Dealers Created America's Secret Police and Set the Stage for the McCarthy Era (2016)
Fiction works include:
* Calico Joe (1976)
* Closing Time (1980)
* The Merchant (1983)
* Clean Slate (1985)
* Diving into the Wreck (1988)
* Sacred Mist (1991)
* An Unforgiving Climate (1993)
* Blood on the Border: A Novel of the U.S.-Mexico War (1996)
* Crossroads: A Novel of the Lewis and Clark Expedition (2001)
* Oracle (2003)
* Dark Midnight: A Novel of Intrigue and Betrayal (2010)
* The Siege (2014)
* Last Day on Mars: A Novel (2018)