The X-Men: The Ultimate Guide, 3rd Edition by Peter Sanderson is a comprehensive hardcover book published in 2006 by Dorling Kindersley Publishing. It serves as the definitive guide to the X-Men universe, providing in-depth information and insights into the iconic superhero team. With a weight of 2 lbs, this book is a must-have for any fan of the X-Men series, offering a detailed exploration of the characters, stories, and lore of the popular franchise in English language.