Shazam! Check out these all powerful books awaiting your whole family!

Adults who are kids at heart:
Marvel Encyclopedia (741.5973 Marvel)

Older kiddos:
Meet the Marvel Super Heroes (J 741.5973 Wyatt)
Meet the Marvel Super Heroes (J 741.5973 Peterson)
Avengers Storybook Collection (Juv Fic, Avenger)
Super Heroes Storybook Collection (Juv Fic, Super) 

Younger Kiddos:
Batman, the Brave and the Bold: Batman and Friends (Beg Rdr, Ashe)
The Astonishing Secret of Awesome Man (Easy, Chabon)
Day I Lost My Superpowers (Easy, Escoffier)
Ten Rules of Being a Superhero (Easy, Pilutti)
Mighty Max (Easy, Ziefert)