Peter Sanderson is a comics historian and critic, who was Marvel's first official archivist. He is the author of DK's best selling X-Men: The Ultimate Guide and co-author of DK's The Marvel Encyclopedia and Marvel Chronicle. Peter was also one of the main writers of the first four versions of The Official Handbook of the Marvel Universe. Matthew Manning has written numerous comics for a variety of publishers, including Marvel and DC. His work has appeared in the pages of The Batman Strikes!, Legion of Super-Heroes in the 31st Century, Justice League Adventures, Spider-Man Unlimited, Looney Tunes, and Marvel Romance Redux. For DK, he has penned Wolverine: Inside the World of the Living Weapon, the updated versions of Spider-Man: The Ultimate Guide and Hulk: The Incredible Guide, the children's reader Marvel Heroes: Greatest Battles, and contributed to Marvel Chronicle. Manning currently resides in Brooklyn with his wife Dorothy, and a collection of comics much too large for any normal-size apartment.