Short answers, pulled from the story.
Ed Stark is an American role-playing game designer who began his career at West End Games writing for the TORG and Star Wars lines. He later joined Wizards of the Coast, where he contributed to multiple Dungeons and Dragons products and was part of the SCRAMJET team that updated the D&D setting for fourth edition.
MasterBook was a generic role-playing ruleset developed at West End Games and used as the mechanical foundation for multiple games. Ed Stark served as the main developer behind the system, making him the primary architect of its rules.
SCRAMJET was an internal team at Wizards of the Coast led by Richard Baker. Its members included Ed Stark, James Wyatt, Matthew Sernett, Michele Carter, Stacy Longstreet, and Chris Perkins. The team was responsible for updating the Dungeons and Dragons fictional setting for use in the fourth edition of the game.
Ed Stark's D&D credits include Legends of the Hero-Kings (1996), Children of the Night: Ghosts (1997), Children of the Night: The Created (1999), Complete Warrior (2003), Fiendish Codex I: Hordes of the Abyss (2006), Fantastic Locations: Dragondown Grotto (2006), Barrow of the Forgotten King (2007), Fantastic Locations: City of Peril (2007), and Complete Champion (2007).
Ed Stark wrote the novel City of Fire under the shared pseudonym T.H. Lain, a house name used by multiple authors writing Dungeons and Dragons fiction.
Ed Stark was the main developer behind the so-called "Fifth edition" of Paranoia, produced during his time at West End Games.