Luke Johnson is one of the main authors of many of the Warcraft RPG (and World of Warcraft RPG) books.
Warcraft and World of Warcraft RPG books
List of Luke Johnson Warcraft RPG books at DriveThruRPG
World of Warcraft RPG: Dark Factions - Luke Johnson Q&A By Medievaldragon – January 15, 2008
Luke Johnson Q&A: World of Warcraft RPG: Horde Player Guide By Medievaldragon – January 16, 2008
Luke Johnson Q&A - World of Warcraft RPG Books By Medievaldragon – January 22, 2008
Translating World of Warcraft into a Tabletop Roleplaying Game: The Content Challenge by Luke Johnson; January 8, 2008