Sorry about the late pick everybody.
Alright, for this round, in the Graphic Novel category, I'll take
Understanding Comics by Scott McCloud.
The blurb from Alan Moore pretty much says it all: "Understanding Comics is quite simply the best analysis of the medium that I have ever encountered." The book is a look at what comic books are, how they work, the tactics and methods that their creators use and employ, and the kinds of effects and undertakings that comics are uniquely suited for. It's a really invigorating read that will make you go back and pick up your old favorites and reread them with a new eye to the craftsmanship and composition involved.