X-Men #40 (Jan 1968)

X-Men #40, published in Jan 1968, is a Silver Age Marvel comic featuring the X-Men, written by Roy Thomas with cover art by George Tuska.

Entitled The Mark of the Monster!, this story stars the X-Men — "Xavier's Finest" — as they battle powerful mutants, alien threats, and super-villains while protecting a world that fears and hates them.

It is regarded as a key X-Men comic due to the following significant event: Origin of Cyclops continued.

Featured appearances include X-Men - Angel (Warren Worthington III), Beast (Henry McCoy), Iceman (Bobby Drake), Cyclops (Scott Summers), and other characters from the X-Men universe.

A classic Silver Age X-Men comic, this issue showcases the birth of Marvel's mutant mythology, featuring iconic characters, memorable first appearances, and the imaginative storytelling that defined the early X-Men era.

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