From Understanding Comics by Scott McCloud (1993). ISBN# 006097625X.
15 years ago, Scott McCloud introduced Understanding Comics, a comic book about comic books that, in an easy-to-digest form, discussed the medium with a smattering of art history and theory and, above all, a desire for stories with something more than just explosions and bad dialog.
McCloud's clever little diagram, for example, is a pretty original innovation. Plus I'm young enough to admit: reading McCloud in the 90s "got me into" René Magritte's Treachery of Images.
McCloud lectures on "A Medium in Transition" tomorrow night, 7:30PM, at Agnes Scott.