The Marvel Universe is full of so many amazing heroes and villains—how do you keep track? Enter the Who's Who in the Marvel Universe character storybook, featuring over 40 key players every Marvel fan needs to know! Readers can get to know the ins-and-outs through three sections: Spider-Man, Guardians of the Galaxy, and the Avengers. Side-bar profiles are paired with adventure stories to introduce each character and their place in the universe.