This is a must-have for any Avengers fan! This comic book features the first appearance of the iconic villain Ultron, and is part of the Silver Age era of US comics. The Avengers #55 comic book is a key issue in the series, and is in the format of a single issue publication from Marvel Comics. The comic book is in very good condition, and is sure to delight collectors and fans alike. The Avengers #55 comic book is part of the Avengers series, and features the superhero team of the same name. The character Ultron is a major player in the Marvel universe, and this comic book is a great way to get started on the Ultron storyline.