Marvel Masterworks: The X-Men, Vol. 3

Collects X-Men (1963) #22-31. Witness the first appearance of X-Men mainstay Banshee and read the rare stories when a sixth mutant member, the Mimic, joined Professor X's squad. Also featured are the beginnings of the long-ranging Factor Three saga, and the classic battle between Mimic and the Super-Adaptoid.