"The Dinosaur Train," The Magazine of Fantasy & Science Fiction, forthcoming.

"Balancing Accounts," The Magazine of Fantasy & Science Fiction, February 2008.

"The Barbary Shore," Shimmer, The Pirate Isssue 2007.

"The Major Villains from My Campaign, 2002-2007," Pyramid March 2007.

"Parsifal (Prix Fixe)," The Magazine of Fantasy & Science Fiction February 2006

"Apocrypha," Journal of Pulse Pounding Narratives #2 (2005)

"The Vampire Brief," in Odder Jobs (Dark Horse Books, 2004).

"The Eckener Alternative," in All Star Zeppelin Adventure Stories  (Wheatland Press, 2004). 

"See My King All Dressed in Red," in Crossroads:  Tales of the Southern Literary Fantastic (Tor, 2004).

"The Ocean of the Blind," The Magazine of Fantasy & Science Fiction April 2004. 

"Train of Events," The Magazine of Fantasy & Science Fiction, January 2003.

"Return to Skull Island," Journal of Pulse-Pounding Narratives #1, 2001.

"The Alien Abduction," The Magazine of Fantasy & Science Fiction, September 2000.

"A Diagram of Rapture," The Magazine of Fantasy & Science Fiction,  April 2000.

Roleplaying Games:

GURPS Planet of Adventure (Steve Jackson Games, 2003).

Terran Empire (Hero Games, 2003).

GURPS Mars  (Steve Jackson Games, 2002).

GURPS Planet Krishna  (Steve Jackson Games, 1997).

Arabian Nights: A Genre Book for Rolemaster  (Iron Crown Enterprises, 1994).

Coauthor of GURPS Space, 4th Edition (Steve Jackson Games, 2006).

Coauthor of Star Hero (Hero Games, 2002).

Coauthor of GURPS Castle Falkenstein  (Steve Jackson Games, 2000)

Coauthor of Star Trek: The Original Series Roleplaying Game (Last Unicorn Games, 1999).

Coauthor of Planetary Adventures, Volume I (Last Unicorn Games, 1999).

Coauthor of Planets of the UFP  (Last Unicorn Games, 1999).

Coauthor of Star Trek:  The Next Generation Roleplaying Game  (Last Unicorn Games, 1998; winner of the 1999 Origins Award for Best Roleplaying Game)

Coauthor of Infernal Player's Guide (Steve Jackson Games, 1998).

Coauthor of Angelic Player's Guide (Steve Jackson Games, 1997).

Coauthor of Heaven and Hell (Steve Jackson Games, 1997).

Coauthor of Night Music (Steve Jackson Games, 1997).

Contributor to GURPS Steam-Tech (Steve Jackson Games, 2001)

Contributor to Best of Pyramid, Volume I (Steve Jackson, 2001)

Contributor to Best of Pyramid, Volume II (Steve Jackson, 2001)

Contributor to Liber Castellorum (Steve Jackson Games, 1999).

Contributor to Liber Servitorum  (Steve Jackson Games, 1999).

Contributor to Fall of the Malakim  (Steve Jackson Games, 1998).

Contributor to Star Wars Classic Adventures:  Vol.4 (West End Games, 1997).

Contributor to Tapani Sector Adventures (West End, 1997).

Contributor to Sixguns and Sorcery (R. Talsorian Games, 1996; winner of the 1997 Origins Award for Best Roleplaying Supplement).

Nonfiction:  

"Hey Kids!  Comics!" Valley Kids,  Fall 2004.

"Local Astronomy Groups Offer Summer Fun" Valley Kids, Summer 2004.

"Darwin's Bottle" Wines and Vines, Summer 2004.

"Berkshire Museum Fun For Winter Weekends," Valley Kids, Winter 2003.

"'Killing Monsters': What's in it for the kids?" Valley Kids, Fall 2003.

"Family skywatching: free, safe, entertaining," Valley Kids, Summer 2003.

"New England Air Museum offers kids rare exhibits," Valley Kids, Spring 2003.

"Flesh Fair: What's Wrong With AI," SF Crow's Nest Online, 2002.

"Plane From the Past," Ithaca Times, August 10, 1999. 

"Watch the Skies," Ithaca Times, July 6, 1999.

"Feats of Clay," Ithaca Times Summer Ithaca 1999.

"Island Beat," Ithaca Times, April 8, 1999.

"Local Hero:  Glenn Curtiss Was an Aviation Pioneer," Ithaca Child, Spring 1999.

"The Greatest Show Off Earth," Ithaca Child,  Summer 1998

"Strange New Worlds," Mercator's World,  March/April 1998

"Ground Control," Ithaca Child,  Spring 1998

"On a Role:  Dungeons & Dragons Games -- and More -- Are Hot," Ithaca Child,  Winter 1997

"Men In Black Have Mysterious History," Ithaca Journal,  July 3, 1997

"The Amazing Airship of 1896," Balloon Life,  July 1996

"Dream and Nightmare: The British Rigid Airship Programme," Balloon Life,  September 1994

"L-59:  The Africa Ship," Airpower,  May 1992.

"Flips, Drips, and the Overhead Bomb," Gambit  magazine, January 31, 1989.

"Flying Horses: Their Ups and Downs," Gambit, Sept. 15, 1987.

"Eye Problems in Medjugorje," Gambit, Sept. 8, 1987.

"Tapping the Mississippi," Gambit,  August 25, 1987.

"Supercollider: The Project Everybody Wants," Gambit,  Aug. 11, 1987.

Roleplaying Articles:

"Supporting Cast:  Doctor Dark and Miss Conduct," Pyramid Online (GURPS/HERO)

"The Last Steampunk Adventure," Pyramid Online (GURPS)

"Supporting Cast:  Merian C. Cooper," Pyramid Online (GURPS)

"GURPS Planet of Adventure Designer's Notes," Pyramid Online  (GURPS)

"Supporting Cast:  Franz Anton Mesmer," Pyramid Online (GURPS)

"Supporting Cast:  The Akashik Four!" Pyramid Online (GURPS)

"Supporting Cast:  Frederick Townsend Ward," Pyramid Online (GURPS)

"Supporting Cast: The Sharp-Edged Man," Pyramid Online (GURPS)

"GURPS Mars Designer's Notes," Pyramid Online (GURPS)

"The Serial Murder Resource Center," Pyramid Online (GURPS)

"Supporting Cast:  Leonardi," Pyramid Online (GURPS)

"Blue Genes," Pyramid Online (GURPS)

"Empire of the Sun: The Inca Empire in GURPS Castle Falkenstein," Pyramid Online (GURPS)

"Masters of Wind and Time:  The Mayan Empire in GURPS Castle Falkenstein," Pyramid Online (GURPS)

"GURPS Planet Krishna Designer's Notes," Pyramid  24 (GURPS)

"Marxists and Magic," Familiar  9 (Campaign setting)

"Tomes," Pyramid  21 (GURPS)

"CybEarth," Pyramid  17 (GURPS)

"The Steel Soprano," Inphobia  57 (Castle Falkenstein)

"The City of Tomorrow,"  Challenge  77 (Space: 1889)

"I Was A Teen-Age Dinosaur!"  Pyramid  13 (GURPS)

"The Cure," Star Wars Adventure Journal  #8

"The Glass Mountain," Pyramid  12 (Castle Falkenstein)

"Nectar," Familiar  2 (Campaign setting)

"Mission to Shastapsh," Challenge  76 (Space: 1889)

"Wind Raiders of Taloraan," Star Wars Adventure Journal  6

"Loyalties," Star Wars Adventure Journal  5

"Yagahina:  World of Eternal Day," Familiar  1 (Campaign setting)

"Karel Rossum," Challenge  75 (Traveller)

"Notes on the Ether," Transactions of the Royal Martian Geographical Society  #8 (Space: 1889)

"Interplanetary Trade," Transactions  #8 (Space: 1889)

"Dr. Amal Ignatius Mendoza," Challenge  74 (Traveller)

"You're In The Army Now," Star Wars Adventure Journal  #2

"The Playing Fields of Mars," Challenge  73 (Space: 1889)

"The French on Mars," Transactions of RMGS  #7 (Space: 1889)

"Something New in the Air," Journal of the Brittanic Technological Society  vol. 1, #3 (Sky Galleons of Mars)

"Secret of the Swamp," Challenge  71 (Space: 1889)

"Space Race," Challenge  71 (Megatraveller)

"The Treasure of Melas," Challenge  70 (Space: 1889)

"Operation Connecticut," Journeys  5 (GURPS).

"Sky Galleons of ... Venus?!" Transactions of the RMGS  6 (Space: 1889).

"Melas: Portrait of a Martian City," Challenge  69 (Space: 1889).

"Martian Religions," Transactions of the RMGS  5 (Space: 1889).

"Science Marches On," Challenge  68 (Space: 1889).

"Mall Rats," Challenge  67 (Dark Conspiracy).

"Secret of the Lost City," Challenge  66 (Space: 1889).

"Moon of Madness," Challenge  65 (Space: 1889).

"Mudd in Your Eye," Challenge  64 (Star Trek Roleplaying Game).

"The Magical Mystery Tour," Challenge  63 (Space: 1889).

"The Monastery of Tasharvan," Challenge  62 (Space: 1889).

"Tom Fleet and His Steam Colossus," Challenge  61 (Space: 1889).

"The Cult of Doom," Challenge  60 (Space: 1889).

"Me, Myself and I," Challenge  59 (GURPS Cyberpunk).

"Escape From Dioscuria," Challenge  59 (Space: 1889).

"The Ghost Writer," Challenge  58 (Call of Cthulhu).

"Dioscuria," Challenge  58 (Space: 1889).

"Here Come the Trolls," Vortext  #3 (Shadowrun).

"Come Join the Party," Challenge  57 (Gamemastering Advice).

"Valley of the Hunters," Challenge  56 (Space: 1889).

"Imprisoned in Noachis," Challenge  55 (Space: 1889).

"Eltanin the Avenger," Challenge  55 (Star Trek Roleplaying Game).

"City of Death," Challenge  54 (Space: 1889).

"Noorlan Revolt," Challenge  53 (Space: 1889).

"Dwellers in the Dark," Challenge  52 (Space: 1889).

"Damsel in Distress," Challenge  51 (Shadowrun).

"The Time Voyager," Challenge  48 (Space: 1889).

"The Bayou Ritual," Challenge  48 (Call of Cthulhu).

"North American Road Atlas and Survival Guide: Southeast Louisiana," Autoduel Quarterly,  Fall 1986 (Car Wars).