I'm sure you all are thrilled to know all about that. Anyhow, moving on (and will hopefully be better about keeping on top of this now!)
The Wizard of Oz by L. Frank Baum - Fairly neutral so far. No one is driven to read it, no one wants it cut. Leaving it because it seems somewhat whimsical, and not a bad choice.
Unnamed Agatha Christie book - Probably a short story collection, maaaybe a novel. Anyhow, this seems one of the likelier choices, especially book-book wise.
The League of Extraordinary Gentlemen volumes 1 and 2 - Still on the list, but probably not for a while, due to being more Moore, and being in two volumes.
Hyperion by Dan Simmons - Perhaps a bit long, but no huge resistance. Still looking for more opinions.
Howl's Moving Castle by Diana Wynne Jones - One of my own preferences, but getting neutral responses in general.
Mrs. Frisby and the Rats of N.I.M.H./The Secret of N.I.M.H. by Robert C. O'Brien - Seems neutral.
Unnamed Discworld novel - Thoughts?
A Robert Silverberg book, possibly Dying Inside or The Book of Skulls - Still mostly undiscussed, mostly due to not being familiar with them.
The Dark Knight Returns by Frank Miller - Another one that seems to be well-received, and a strong possibility.
Astro City - suggested someone offhandedly in comments, no real discussion, but I actually haven't read it and it's supposed to be awesome. Don't know how suitable it would/wouldn't be for this. Thoughts?
Wrapped up with suggestions from one comment that I'm just mostly cutting and pasting due to laziness on my part:
D.C. The New Frontier by Darwyn Cooke. 2 volumes, great art, and a neat, self-contained, take on the various DC superheroes.
Fun Home by Alison Bechdel. Got a lot of critical acclaim when it came out, and I thought it was great when I read it a year or two ago. Very different style of comic than any of the others we've been reading, or talking about reading.
Understanding Comics, by Scott McCloud Do we do non-fiction? If we're going to be reading more GNs, it can't hurt to go over the definitive work on comics criticism, can it?
Some Sandman as long as we're doing the GN canon. Vol 3 (Dream Country) would be perfect, since it consists of standalone stories and doesn't require familiarty with the ongoing continuity, except is is pretty short, and might not fill out a month. Maybe pair it with something that's hard to fit into 1 month, but could be done in 5 weeks?
Queen and Country, the Definitive Edition Vol 1, by Greg Rucka: Q&C is an awesome modern-day spy series, and more people should read it. That's my story and I'm sticking to it.
Cut from the list: Orphans Tales (length), Name of the Wind (length, unfinishedness), The Best Short Stories of J. G. Ballard due to even the suggester not knowing anything about it and suggesting it get pulled, Wild Cards (out of printness), Fables because at least one participants hates the author like poison and we have enough Graphic Novels floating around that we don't need this one,
Anyhow, my own comments on any of the new stuff below.