I just finished Alice I Have Been by Melanie Benjamin. I really liked it! It's based on the real lives of Lewis Carroll and the real "Alice" from Alice in Wonderland. Apparently, Lewis Carroll was sort of a pedophile, although it seems he never acted on the impulses. Of course it is still a work of fiction, but it is based on fact.
I am now reading The Thirteenth Tale. I've only read about 2 pages so far, as I got too tired last night. I think it'll be good though - I'd been eyeing it for awhile, and the other day it was on the Clearance rack at Barnes & Noble for $6!