I felt the story line was wrapped up after the end of the last book. I enjoyed this book. It was nice having Simon as the focal point for a large part of the book, and his continued development as a major character. Jace was starting to irritate me however, with his ridiculous "I love you but I can't have you," thing with Clary. I'll be happy to read the next and final book, but I think that should definitely be a wrap for this series.