Somewhat disappointing. The artwork didn't do that much for me, and while at first the concept behind the book ("night bookmobile" with a twist) was interesting, I didn't really identify with the main character, and found her ultimate decision to be somewhat distasteful - made with too little consideration (it seemed) and with too much potential to become disastrous. Still, a quick read with lots of books featured. That was kind of fun.
Oh, I said I didn't care for the artwork, but it's clear that Niffenegger paid a lot of attention when rendering the books' covers (and especially spines). I appreciate that.