Here are a few books that may not show up in your local comic shop or on the front table at the local Barnes & Noble, but are still worth seeking out:
A large art book from S. Clay Wilson has to be an amazing thing. This new volume from Ten Speed Press features the man who may have been the heart of underground comix.
Fantagraphics releases so many books these days it might be easy to lose this necessary retrospective of Greg Irons -- one of the most underpublished underground comix artists of importance. Curiously, I couldn't find this searching the Fantagraphics web site.
The ComicsComics blog was where I found out that Last Gasp is selling copies of this important undergound comic again, a kind of pre-ArcadeArcade.