Surprising ending. The book is building the story with a crescendo, but the end is very sudden. Open for a second part, for sure, but I was expecting more of a story that gets together for a great ending that takes a long time to happen, but no, it's like all the final story is rushed and finished in a few chapters. That been said, I really enjoyed, even the appendix at the end. They add more to the story, especially once you know everything.