Tom DeFalco's earliest comic-book scripts were for Archie and DC; he soon moved to Marvel, where he wrote Avengers, Machine Man and other titles, also launching Dazzler, a hit series of the early '80s. In addition to writing long and well-received runs on Amazing Spider-Man and Thor, DeFalco edited many titles, eventually becoming editor in chief. During the 1980s, he headed the creative team that provided fictional biographies for G.I. Joe members, originally included with Hasbro's toys and later used as the basis for multiple storylines on the animated series. Perhaps his best-known work is multi-title character Spider-Girl, whom he introduced in 1998. DeFalco has authored multiple books, including Ultimate Guides for Avengers, Fantastic Four, Hulk and Spider-Man. Best known for long runs on Spider-Girl and Untold Tales of Spider-Man, artist Pat Olliffe has also illustrated such Marvel series as Nomad, Sensational She-Hulk, Thor, Thor Corps, Unlimited Access, Warlock and the Infinity Watch, Last Hero Standing and Last Planet Standing.