good book

I just read Cormac McCarthy's The Road the other day and it was really good. It's really good whether or not Oprah put her sticker of approval on it (not to act like i'm above being a fan of oprah. most of the time i think she rocks). I love Cormac anyway, maybe because I'd be a cowboy in another life, he writes a book like it's one long poem, and somehow pages on describing one mundane process of saddling a horse or fixing a shopping cart can be entirely fascinating.
The Road was totally disturbing and I'm still thinking about it. I was going to sort out some possibility of a happy(ier?) ending to make myself feel better, but for once in my life thought it couldn't get worse than that (though later i figured out one precious loophole...) and I prayed the whole way through that they'd die already. So read it. I couldn't stop despite Evelyn's best efforts to get Mommy's attention back, which leads me to the question If you buy a book and read it within several hours are you allowed to return it like nothing happened?