The Creation of Batman

"When young Bruce Wayne's parents were killed, he vowed to avenge their deaths as Batman. Also known as the Dark Knight, Batman often works from the shadows, and many people believe he is just a legend. Along with his sidekick, Robin, Batman fights tirelessly Gotham City's streets free of crime."

-DC Comics: The Ultimate Character Guide

This is a really good guide for anyone who's starting out in comics, but I hope they make a new one for the New 52.