Mars Attacks (with Ray W Murill (Will Murray))
2. War Dogs of the Golden Horde (1996)

Executioner
226. Red Horse (1997)

Wild Adventures Of Doc Savage (with Lester Dent)
1. The Desert Demons (2011)

All-New Wild Adventures of Doc Savage
6. Skull Island (2013)

The Spider : Judge, Jury & Executioner (2011) (with Robin Wayne Bailey)

Destroyer
56. Encounter Group (1984) (with Warren Murphy)
63. The Sky is Falling (1986) (with Warren Murphy and Richard Ben Sapir)
65. Lost Yesterday (1986) (with Richard Ben Sapir)
69. Blood Ties (1987) (with Warren Murphy)
70. The Eleventh Hour (1987) (with Molly Cochran and Warren Murphy)
71. Return Engagement (1988) (with Warren Murphy)
72. Sole Survivor (1988) (with Warren Murphy)
73. Line of Succession (1988) (with Warren Murphy)
74. Walking Wounded (1988)
75. Rain of Terror (1988)
76. The Final Crusade (1989)
77. Coin of the Realm (1989)
78. Blue Smoke and Mirrors (1989) (with Richard Ben Sapir)
79. Shooting Schedule (1990)
80. Death Sentence (1990)
81. Hostile Takeover (1990)
82. Survival Course (1990)
83. Skull Duggery (1990)
84. Ground Zero (1991)
85. Blood Lust (1991)
86. Arabian Nightmare (1991)
87. Mob Psychology (1992)
88. The Ultimate Death (1992)
89. Dark Horse (1992)
90. Ghost in the Machine (1992)
91. Cold Warrior (1993)
92. The Last Dragon (1993) (with Warren Murphy and Richard Ben Sapir)
93. Terminal Transmission (1993)
94. Feeding Frenzy (1993) (with Warren Murphy)
95. High Priestess (1994) (with Warren Murphy and Richard Ben Sapir)
96. Infernal Revenue (1994) (with Warren Murphy)
97. Identity Crisis (1994)
98. Target of Opportunity (1994)
99. The Color of Fear (1995)
100. Last Rites (1995) (with Warren Murphy)
101. Bidding War (1995) (with Warren Murphy and Richard Ben Sapir)
102. Unite and Conquer (1996)
103. Engines of Destruction (1996) (with Warren Murphy and Richard Ben Sapir)
104. Angry White Mailmen (1996)
105. Scorched Earth (1996)
106. White Water (1997)
107. Feast or Famine (1997)

Doc Savage
184. Python Isle (1991)
185. White Eyes (1992)
186. The Frightened Fish (1992)
187. The Jade Ogre (1992)
188. Flight into Fear (1993)
189. The Whistling Wraith (1993)
190. The Forgotten Realm (1993)
Writings in Bronze (2011)