Liked:* Really interesting world-building. I especially liked the conjecture as to how online gaming would develop in the future. * I really liked some of the characters, especially the Class 5 AIs. They were the most developed in the book.* The main mystery was interesting and kept my interest.Liked Less:* Not all of the characters were as well-developed as Richards & Hughie. I really would have loved to learn more about Otto (supposedly the other main character) and to have a better sense of him.* The pacing of the plot seemed a little uneven at times.* Cliffhanger ending!!! I am not always annoyed by a cliffhanger but it felt like nothing was resolved at all. Sure, the mystery was solved but not in a way that left me feeling satisfied.