Minor minor spoilers in this review. 
 I FINISHED!!! It just came out and now it's done again! 
 This book was intense. I was so sad about Jace and his crisis, and then Clary..... and then with Jordan and Maia it was happy, and then Simon being all Noble. Then the end with Magnus and Alec, I cried. Oh MY. 
 And Sebastian...Johnathon of the Morganstern variety, not herondale/lightwood variety. At first I was super scared and creeped out, and then you get up into the middle part of the book and you wonder what life is really like for him. He softens a bit, and for a second I was almost tricked into thinking something had gone right with him. Then, you get near the end, and it all goes down. And let me just say, 
 *******Spoiler...****** The fight between Sebastian and Clary near the end is intense. He's really scary and gross and creepy, and they're arguing and fighting and there's blood everywhere. 
 This book was good. I liked it better than the fourth book, you know, the one with scary Jace. By the way, I've created a little evolution of Jace list below. 
 Book 1: Jace is sarcastic and kinda mean. 
 book 2: Jace is still sarcastic but the tiniest bit...nicer? 
 book 3: Sappy Jace. Less sarcasm, more sap. Sad and sappy. Not the best jace... 
 book 4: Scary Jace. The Jace that acted like a crack addict... 
 book 5: I'm going to call book five the identity crisis Jace. I kind of missed Jace in this book because he was so different. Obviously it wasn't his fault, but I liked those flashes of the real Jace we got in their. I nearly cried. 
 Well, looks like another year for the next book, right?