This book scared the shit out of me, in places. And it was so, so well done. I knew it had been well done before the Robopocalypse guy tried to rip it off, but after slugging my way a third of the way into that piece of crap I really know how well this was done. There are fits and starts of twee-ness and implausibility, but I read the book hunched over, brow creased in worry, probably breathing fast, from beginning to end. One of the best books of the 21st century.