John Gregory Betancourt

Slab's Tavern
   1. On the Rocks at Slab's (2008)
   2. Well Bottled at Slab's (2010)
   3. On the Scent at Slab's (2010)
   4. Cleaning Up at Slab's (2010)
   Slab's Tavern (1987)

Hercules
   1. The Wrath of Poseidon (1997)
   2. The Vengeance of Hera (1997)
   3. The Gates of Hades (1997)

Roger Zelazny's Dawn of Amber
continued from the original series by Roger Zelazny
   1. Nine Princes of Chaos (2002)
     aka The Dawn of Amber
   2. Chaos and Amber (2003)
   3. To Rule in Amber (2004)
   4. Shadows of Amber (2005)

   Rogue Pirate (1987)
   The Blind Archer (1988)
   Johnny Zed (1988)
   Rememory (1990)
   Performance Art (1992)
   Cutthroat Island (1995)
   Pacifica (2002) (with Linda E Bushyager)
   The Dragon Sorcerer (2003)

   Playing in Wonderland (1994)
   The Science Fiction Crime Megapack (2017) (with Nelson S Bond, Lin Carter, David H Keller, Frank Belknap Long, Louis Newman, James Norman, Mack Reynolds, Ron Reynolds, Kristine Kathryn Rusch, Charles V. De Vet, Edward Wellen, Robert Moore Williams, Richard Wilson, Robert Zacks and Arthur Leo Zagat)
   The King Arthur MEGAPACK : Tales of King Arthur and His Knights (2018) (with Oscar Fay Adams, Max Adeler, George Parker Bidder, J. S. Blackie, Mortimer Collins, Thomas Deloney, Wolfram von Eschenback, Rupert S. Holland, James Knowles, Sir Thomas Mallory, Howard Pyle, Ernest Rhys, Lord Alfred Tennyson and Mark Twain)

   Dry Days in Yellow Gulch (2008)
   The Adventure of the Amateur Mendicant Society (2009)
   Dreamtime in Adjaphon (2010)
   The Duke of Demolition Goes to Hell (2010)
   Faramigon's Eye (2010)
   The Last Guardian of Ru Ishtl (2010)
   Sympathy for Monsters (2010)
   Sympathy for Zombies (2010)
   A One-Pipe Problem (2018)
   The Nature of the Beast: A Tale of The Things (2020)
   The Rat Aloft (2022)
   Had a Wife... (2022) (with Janet Fox)

Amazing Stories
   5. Starskimmer (1986)

Dr Bones
   4. The Dragons of Komako (1989)

Robert Silverberg's Time Tours
   4. The Dinosaur Trackers (1991) (as by Thomas Shadwell)
   6. Caesar's Time Legions (1991) (as by Jeremy Kingston)

Dragonflight (with Kevin J Anderson)
   Born of Elven Blood (1994)

Star Trek : Deep Space Nine
   11. Devil in the Sky (1995) (with Greg Cox)
   17. The Heart of the Warrior (1996)

Star Trek : Voyager
   5. Incident at Arbuk (1995)

Birthright
   4. The Hag's Contract (1996)

Star Trek : The Next Generation
   51. Infection (1999)
   Double Helix Omnibus (omnibus) (2002) (with Diane Carey, Peter David, Michael Jan Friedman, Christie Golden, Kristine Kathryn Rusch, Dean Wesley Smith and John Vornholt)

Black Cat Weekly
   6. Black Cat Weekly #6 (2021) (with Hal Charles, Bobbi A Chukran, Ralph Milne Farley, Barb Goffman, Dashiell Hammett, A R Morlan, Frank Lovell Nelson, E Nesbit and Dwight V Swain)
   7. Black Cat Weekly #7 (2021) (with Reginald Bretnor, Hal Charles, Andy Duncan, Milton Lesser, Ruth Malone, Adam Meyer, A R Morlan, Frank Lovell Nelson and Frank M Robinson)
   8. Black Cat Weekly #8 (2021) (with Robert Camp, Nick Carter, Hal Charles, Edith Dorian, John M Floyd, Stephen Gallagher, Frank Lovell Nelson and Darrell Schweitzer)
   9. Black Cat Weekly #9 (2021) (with H Bedford-Jones, Hal Charles, Amelia B Edwards, Milton Lesser, Lee Mayers, A R Morlan, Michael Nethercott, Kris Neville and Lee Roberts)
   10. Black Cat Weekly #10 (2021) (with Eando Binder, Hal Charles, Dale Clark, David Dean, Carl Jacobi, Murray Leinster, Milton Lesser and Frank Lovell Nelson)
   12. Black Cat Weekly #12 (2021) (with Shelly Dickson Carr, Paul Chadwick, Hal Charles, Lester del Rey, John S Glasby, Elizabeth Sanxay Holding, Kris Neville, Frederik Pohl and Frank M Robinson)
   14. Black Cat Weekly #14 (2021) (with Zenith Brown, Melodie Campbell, Nick Carter, Hal Charles, Barb Goffman, Edmond Hamilton, Henry Kuttner, Tom Purdom and Larry Tritten)
   16. Black Cat Weekly #16 (2021) (with Christopher B Booth, Hal Charles, Malcolm Jameson, Frank Kane, Nisi Shawl, Paige Sleuth, Michael Swanwick, Larry Tritten and Stacy Woodson)
   39. Black Cat Weekly #39 (2022) (with Hal Charles, Hulbert Footner, Saul Golubcow, Edmond Hamilton, Malcolm Jameson, Clifford Knight, Henry Kuttner, Art Taylor, Joseph S Walker and Walter Jon Williams)
   58. Black Cat Weekly #58 (2022) (with Hal Charles, Janet Fox, Kaye George, Craig Laurance Gidney, Sherry Harris, Herminie Templeton Kavanagh, Murray Leinster, John T McIntyre, Fletcher Pratt and Frank C Robertson)
   67. Black Cat Weekly #67 (2022) (with Hal Charles, Nina Kiriki Hoffman, Murray Leinster, Milton Lesser, Lawrence L Lynch, Johnston McCulley, Christine Poulson and Frank Zafiro)

Ultimate...
   The Ultimate Witch (1993) (with Byron Preiss)
   The Ultimate Zombie (1993) (with Byron Preiss)
   The Ultimate Alien (1995) (with Keith R A DeCandido and Byron Preiss)
   The Ultimate Undead (2006) (with Byron Preiss)

   Swashbuckling Editor Stories (1993)
   The Best of Weird Tales (1995) (with Marvin Kaye)
   Pulp Classics: Ghost Stories (June 1931) (2004)
   Horrorscape (2005)
   Horrorscape 2 (2005)
   Horror: The Best Of 2005 (2006)
   Horror: The Best of the Year (2006) (with Sean Wallace)
   Horror: The Best of the Year 2007 (2011) (with Sean Wallace)
   Short Things (2019)
   The Ghost Story Megapack (2020)
   The Second Ghost Story Megapack (2020)
   The Third Ghost Story Megapack (2020)

   The Sci-Fi Channel Trivia Book (1996)
   Serve It Forth (1996) (with Anne McCaffrey)
   The Sci-Fi Channel Encyclopedia of TV Science Fiction (1997)