I think Meyer tried to do too much. There is so much time travel concepts woven together that it became more confusing than satisfying. Just so much going on as well as the way it dealt with Brit and Phillip was difficult to simply accept as the reader. The first 3 books in this series is fantastic, I still greatly enjoyed #4 but honestly felt wanting on this one. It appears there will be more, so hopefully we get some return to pure fun like the previous books.