Caitlin Strong series
Strong Enough to Die 2009
Strong Justice 2010
Strong at the Break 2011
Strong Vengeance 2012
Strong Rain Falling 2013
Strong Darkness 2014
Strong Light of Day 2015

Ben Kamal and Danielle Barnea series
The Walls of Jericho 1997
The Pillars of Solomon 1999
A Walk in the Darkness 2000
Keepers of the Gate 2001
Blood Diamonds 2002
The Blue Widows 2003
The Last Prophecy 2004

Blaine McCracken series
The Omega Command 1986
The Alpha Deception 1987
The Gamma Option 1989
The Omicron Legion 1991
The Vengeance of the Tau 1993
Day of the Delphi 1993
Kingdom of the Seven 1994
The Fires of Midnight 1996
Dead Simple 1998
Pandora's Temple 2012
The Tenth Circle 2013

Jared Kimberlain series
The Eighth Trumpet 1989
The Ninth Dominion 1991

Michael Tiranno series
The Seven Sins: The Tyrant Ascending 2008
Black Scorpion: The Tyrant Reborn 2015

Novels
The Doomsday Spiral 1983
Vortex 1984
The Lucifer Directive 1984
Labyrinth 1985
The Council of Ten 1987
The Valhalla Testament 1990
Hope Mountain 1998
Dolphin Key 1999