This document provides an overview of Marvel Comics, including:
1) A brief history of Marvel from its founding in 1939 to its acquisition by Disney in 2009.
2) Descriptions of Marvel's main comic book universes such as Earth-616 and alternate realities like Earth-1610.
3) Profiles of some of Marvel's most well-known characters like Spider-Man, Hulk, Thor, Loki, Iron Man, Deadpool, Wolverine, and villains Red Skull and Thanos.
4) Details on character organizations like the X-Men and Fantastic Four as well as S.H.I.E.L.D. and the Avengers.