The challenge: create an entire 24-page comic book in 24 consecutive hours. Hundreds of cartoonists have taken this challenge, turning out works that were amazing, amusing, or revelatory.

Four-time Harvey Award and Eisner Award winner Scott McCloud, comicdom's top theoretician and inventor of the 24-hour comic, explains the concept and presents nine of the best.

Includes stories by Neil Gaiman, Al Davison, and more.