I'm really enjoying this series, and I think I liked this book even more than the first. The characterization of both Jacob and Mary Beth is extremely well done. They're not cardboard cut-outs, by any means. Both of them have understandable issues with intimacy, but they manage to make their relationship work, even through the rough spots.
The revelation of the villain wasn't really much of a surprise, but the last confrontation between the villain, Mary Beth and Jacob was suspenseful, and the resolution was definitely satisfying. (And now, like everyone else, I'm waiting to read Nobody's story, which I hope is the next up in the series.)