It's surprising to some that pulp fiction is more than just a film starring Uma Thurman and John Travolta. No, pulp fiction was once the most popular form of literature in the land. (They were called pulps because of the cheap paper they were printed on.) Back in the '30s and '40s, readers devoured tales of Walter Gibson's The Shadow, a character that later inspired Batman, and Lester Dent's Doc Savage, the precursor to Superman. The stories were full of adventure, sex, suspense and revenge. You know, action!