This book works the same way as a train wreck: Unpleasant, but you can't look away. Not a single likeable character to be found, and I was waiting for the other shoe to drop the entire time. But it didn't, and that made the ending really underwhelming, unfortunately, as others have noted. The book would have benefitted from a more high-impact ending, as it really feels like this is what it's building toward. I highly recommend the audio version. It gets across the claustrophobic and uncomfortable atmosphere incredibly well.