They Could Be Heroes Rise of the Superheroes--Greatest Silver Age Comic Books and Characters is a visual and entertaining adventure exploring one of the most popular and significant eras of comic book history. From 1956 to 1970, the era gave us Spider-Man, The Avengers, X-Men, The Incredible Hulk, Iron Man and a flurry of other unforgettable and formidable characters. The Silver Age redefined and immortalized superheroes as the massive pop culture...