 The pair, together with Bryan Ansell, founded Citadel Miniatures in Newark to make miniatures for games.Livingstone has also invented several board games, including "Boom Town", "Judge Dredd", "Automania", "Legend of Zagor", and "Dragonmasters".In 1982, Jackson and Livingstone co-wrote "The Warlock of Firetop Mountain", the first book in the "Fighting Fantasy" series, but following an instruction from publishers Penguin to write more books "as quickly as possible" the pair wrote subsequent books separately.