Bureau 13
1. Bureau 13 (1991)
1. Judgment Night (2000)
2. Doomsday Exam (1990)
3. Full Moonster (1992)
4. Damned Nation (2005)
Bureau 13 Double: Judgment Night / Doomsday Exam (omnibus) (2004)
Judgement Night (2006)

Deathlands
46. Gemini Rising (1999)
47. Gaia's Demise (1999)
48. Dark Reckoning (1999)
50. Pandora's Redoubt (2000)
52. Zero City (2000)
53. Savage Armada (2001)
54. Judas Strike (2001)
55. Shadow Fortress (2001)
63. Devil Riders: Scorpion God - Book 1 (2003)
64. Bloodfire: Scorpion God - Book 2 (2003)
75. Shatter Zone (2006)
76. Perdition Valley (2006)
78. Sky Raider (2007)
81. Desert Kings (2008)
86. Eden's Twilight (2009)
89. Time Castaways (2009)
95. Moonfeast (2010)
98. Tainted Cascade (2011)
100. Prodigal's Return (2011)
110. Sins of Honor (2013)

Stony Man
57. Sky Killers (2002)
62. Deep Rampage (2002)
74. The Chameleon Factor (2004)
81. Sky Hammer (2006)
92. Capital Offensive (2007)
94. Act of War (2008)
96. Dark Star (2008)

Mack Bolan
96. Stolen Arrows (2004)

Illegal Aliens (1989) (with Phil Foglio)
That Darn Squid God (2004) (with James Clay)
Invasion from Uranus (2008)
Belle, Book And Candle (2012)
Gentlemen Prefer Witches (2012)

The Bureau 13 Sourcebook (2007) (with Richard Tucholka)

Endless Quest
43. American Knights (1995)
47. The 24-hour War (1995)

Shadowrun
25. Shadowboxer (1997)