The Sandman Companion
This companion to Neil Gaiman's lengthy and wonderful Sandman comic epic derives most of it's merit from a in depth interview with the man himself.
Watchmen
I normally don't blog about comics since, strictly speaking, even in trade paperback form they're not novels. Even the majestic Sandman series consists of short stories and novellas. Moore and Gibbon's classic, however, is beyond all doubt a true graphic novel.
Watchmen is about a subtly different version of now, where "superheroes" or masked vigilantes really existed, and the consequences of their existence for every living person.
It's a densely layered piece making the best of a medium that is both visual and written. The central narrative unwinds beautifully, the characters are exquisitely portrayed, and the questions asked resonate in your mind for years.
It's a piece I have read many times, and yet I continue to find new details in it even today.
I recommend this book to anyone, with no hesitation.
Understanding Comics
This a serious discussion of the nature and potential of sequential art written in comic form.
It's a very persuasive and powerful piece of work.
Probably for people who'd like to have some insight into the theory and practice of comics.