It's not the end of the world Anna, you can take J.T. off, I'm just stubborn when it comes to books I really love - but ya'll will miss out on a really good book that could have still been read over a period of time (say 50 pages a week) and discussed. Rule of the Bone is an excellent book, probably more mainstream than Sarah, and Banks is well known (he wrote Affliction, The Continental Divide, The Sweet Hereafter) so he would appeal to more people.
If I vote for two (minus Leroy) it'd be Banks and Coleman. I'm tempted to vote for Sebold just so I can debate it's merits, but I'm sure it'll get enough votes on it's own.