Harry MacNeil mystery
1. Rubout At the Onyx (1981)
2. Murder On Mike (1984)
3. The Rag Doll Murder (1987)

Morgan
1. Morgan (1989)
2. Blood On the Nueces (1989)
3. Texas Bounty (1989)

A Sergeant John Bogdanovic Mystery
1. A Grand Night For Murder (1995)
2. Reader's Guide to Murder (1996)
3. Corpus Corpus (1998)

Arlene Flynn Mystery
1. What Mommy Said (1997)

The Cia (1970)
The Napoleon of New York (1980)
Diamond Jim Brady (1980)
Murder Along Way (1991)
Hollywood Mother of the Year (1992) (with Sheila MacRae)
Who Killed Precious? (1992)
Profiles in Evil (1992)
Commissioner Roosevelt (1994)
A Spy in Canaan (1995)
Colonel Roosevelt (1996)
The Good Cigar (1996) (with Kevin Gordon)
High Spirits (1997)
The Bully Pulpit (1998)
21 (1999) (with H Peter Kriendler)
An Honest President (2000)
Legends of Santa Claus (2000)
With an Axe (2000)
The Complete Idiot's Guide to the Great Depression (2001)
Sal Mineo (2001)
Theodore Roosevelt Jr (2002)
In the Roughrider's Shadow (2003)
The 100 Greatest Heroes (2003)
Ace of Aces (2003)
Disaster By the Bay (2003)
Roosevelt the Explorer (2003)
The Complete Idiot's Guide to Jerusalem (2004)
History's Greatest Conspiracies (2004)
Billy Mitchell (2006)
Burning Cold (2006)
I Told You So (2006)
The Freemasons in America (2006)
Onward We Charge (2007)
The Perfect Pipe (2007)
Command of Honor (2008)
Taking Command (2009)
The Bilderberg Conspiracy (2009)
Dark Mysteries of the Vatican (2010)