I like to read webcomix while high, or watch movies, because it's easier to concentrate on images than it is to on words. However, I've found comic books interesting- Johnny the Homicidal Maniac, the Sandman, the Punisher, to name a few. On some occasions, with exceptional books (Fear and Loathing, Hitchhiker's Guide, DeLint's Newford Stories) I can imagine the events in the books much more vividly while high than while not.