- "Ωρολογική βόμβα" (1968)
- "North From Thursday" (1969)
- "The Adventurers" (1970)
- "Seven Times Seven" (1972)
- "Fire-Eater" (1974)
- "The Green-Eyed Monster" (1975)
- "The Fortune Hunters" (1976)
- "The Spykillers" (1977)
- "The Golden Goddess" (1978)
- "Ice Falcon" (1979)
- "Red Alert" (1980)
- "Day of Infamy" (1982)
- "Blood and Thunder" (1983)
- "The Doomsday Syndrome" (1984)
- "The Armageddon Countdown" (1985)
- "The Last Crusade" (1986)
- "The Trojan Horse" (1987)
- "The Devil's Advocate" (1988)
- "The Day After Doomsday" (1989)
- "The Omega Conspiracy" (1990)
- "The Judas Strain" (1991)
- "The Apocalypse Scroll" (1992)
- "The Omega Project" (1993)
- "The Doomsday Equation" (1994)
- "The Lazarus Agenda" (1995)
- "The Armageddon Factor" (1996)
- "The Final Prophecy" (1997)
- "The Omega Directive" (1998)
- "The Apocalypse Trigger" (1999)
- "Theomsday Countdown" (2000)
Μη μυθοπλασία:
- "1944:FDR and the Election That Changed America" (2004)
- "Saving the Nation:George W. Bush and the 2000 Election" (2004)
- "JFK and Vietnam:Deception, Intrigue, and the Struggle for Power" (2006)
- "The Year That Changed America:1968 and the Road to Revolution" (2008)
- "The President and the Pope:John F. Kennedy and Pope John XXIII" (2011)
- "The Secret Plot to Kill Hitler" (2013)
Ιστορική μυθοπλασία:
- "The Lost King" (2015)
- "The King's Revenge" (2016)
- "The King's Justice" (2017)