I greatly enjoyed this creepy story of robots gone mad, primarily because of the human element. The story is told through narratives of several different people - a phone phreak, an asian enthusiast, a native american policeman, an american soldier, and a politician's daughter among them. The tech here is mostly believable, a requirement for any book written this century. The exception is the AI, which is still "out there". Finally, this book is very much a thriller - whenever I sat down to read, it was 100 pages later that I surfaced, and I finished the book shortly after midnight.
Most of the reviews I have glanced at compare this book to World War Z, which I have not (yet) read. Thrilling story, engaging characters, and believable are all in the pro column; something I can't quite identify in the writing brings it down half a point. In the end, I really liked it.