44 titles- The Assassin's Handbook (New York: St Martin's Press, 1982) as by Warren Murphy and Richard Sapir
- Destroyer #64: The Last Alchemist (New York: New American Library/Signet Books, 1986) with Warren Murphy and Richard Ben Sapir
- Destroyer #65: Lost Yesterday (New York: New American Library/Signet Books, 1986) with Richard Ben Sapir
- Destroyer #69: Blood Ties (New York: New American Library/Signet Books, 1987) with Warren Murphy
- Destroyer #70: The Eleventh Hour (New York: New American Library/Signet Books, 1987) with Molly Cochran and Warren Murphy
- Destroyer #71: Return Engagement (New York: New American Library/Signet Books, 1988) with Warren Murphy
- Destroyer #72: Sole Survivor (New York: New American Library/Signet Books, 1988) with Warren Murphy
- Destroyer #73: Line of Succession (New York: New American Library/Signet Books, 1988) with Warren Murphy
- Destroyer #74: Walking Wounded (New York: New American Library/Signet Books, 1988)
- Destroyer #75: Rain of Terror (New York: New American Library/Signet Books, 1989)
- Destroyer #76: The Final Crusade (New York: New American Library/Signet Books, 1989)
- Destroyer #77: Coin of the Realm (New York: New American Library/Signet Books, 1989)
- Destroyer #78: Blue Smoke and Mirrors (New York: New American Library/Signet Books, 1989)
- Destroyer #79: Shooting Schedule (New York: New American Library/Signet Books, 1990)
- Destroyer #80: Death Sentence (New York: New American Library/Signet Books, 1990)
- Destroyer #81: Hostile Takeover (New York: New American Library/Signet Books, 1990)
- Destroyer #82: Survival Course (New York: New American Library/Signet Books, 1990)
- Destroyer #83: Skull Duggery (New York: New American Library/Signet Books, 1991)
- Destroyer #84: Ground Zero (New York: New American Library/Signet Books, 1991)
- Destroyer #85: Blood Lust (New York: New American Library/Signet Books, 1991)
- Destroyer #86: Arabian Nightmare (New York: New American Library/Signet Books, 1991)
- Destroyer #87: Mob Psychology (New York: New American Library/Signet Books, 1992)
- Destroyer #88: The Ultimate Death (New York: New American Library/Signet Books, 1992)
- Destroyer #96: Infernal Revenue (New York: Worldwide Library/Gold Eagle, 1994)
- Destroyer #102: Unite and Conquer (New York: Worldwide Library/Gold Eagle, 1996)
- Destroyer #106: Angry White Mailmen (New York: Worldwide Library/Gold Eagle, 1994)
- Doc Savage: Python Isle (New York: Bantam Books/Falcon, 1991) as by Kenneth Robeson
- Doc Savage: Reflections in Bronze (Greenwood, Massachusetts: Odyssey Publications, 1980)
- Doc Savage: The Forgotten Realm (New York: Bantam Books/Falcon, 1993) as by Kenneth Robeson
- Doc Savage: The Frightened Fish (New York: Bantam Books/Falcon, 1992) as by Kenneth Robeson
- Doc Savage: The Jade Ogre (New York: Bantam Books/Falcon, 1992) as by Kenneth Robeson
- Doc Savage: The Whistling Wraith (New York: Bantam Books/Falcon, 1993) as by Kenneth Robeson
- Doc Savage: White Eyes (New York: Bantam Books/Falcon, 1992) as by Kenneth Robeson
- The Duende History of the Shadow Magazine (Greenwood, Massachusetts: Odyssey Publications, 1980)
- Flight into Fear (New York: Bantam Books/Falcon, 1993) as by Kenneth Robeson
- The H P Lovecraft Dream Book (West Warwick, Rhode Island: Necronomicon Press, 1996) with S T Joshi and Dave E Shultz
- Inside Sinanju (New York: Pinnacle Crossfire, 1985) as by Warren Murphy and Richard Sapir
- Mars Attacks #2: War Dogs of the Golden Horde (New York: Ballantine Books/Del Rey, 1996) as by Ray W Murill
- Nick Fury, Agent of S.H.I.E.L.D.: Empyre (New York: Berkley Boulevard, 2000)
- Secret Agent X: A History (Oak Forest, Illinois: Robert Weinberg, 1980) with Tom Johnson
- Secret Agent X: A History: Revised Edition (Seymour, Texas: Fading Shadow, Inc, 1991) with Tom Johnson
- Secrets of Doc Savage (Greenwood, Massachusetts: Odyssey Publications, 1981)
- Tarzan: Conqueror of Mars (no place given: Altus Press, 2020)
- Tarzan: Return to Pal-ul-don (no place given: Altus Press, 2015)