I always love these books, but this one just didn't have the same feel to it as the others, to me. Don't get me wrong, it was pretty good, I just kind of felt like the characters were different and it wasn't as thrilling as the previous three books. There wasn't really very much tension. I don't know, maybe it's just me but Jace didn't seem as snarky, and some of the other characters were just different. Then there was the matter that the beginning was difficult to push through, it was slow to tell the truth. Not much went down for well over a hundred pages. The action was limited, whereas the previous books had no problem accomplishing a good balance between action and personal lives of the characters. City of Fallen Angels, though, was more about the characters relationships with one another than anything else. Simon and Isabelle, Simon and Maia, Maia and Jordan, Jocelyn and Luke, Jocelyn and Jace, Clary and Jace, Magnus and Alec, Magnus and Camille...I think it goes on. These books are kind of turning into angsty teenage soap operas with what's happening in all these people's lives. Jace and Clary too, there relationship seems a little over the top with the lovey-doveyness, it's a little much to tell the truth. Jace just doesn't seem the same as he used to and their relationship is missing that thrill of the first three books of angst and forbidden stolen kisses. 
 I just don't know. I liked the book, I'm just not sure continuing these character's story was the best idea. Of course I'll read the next two books, and the rest of the Infernal Devices and the new series I've heard rumor about coming out after these are all finished, one that's set in Los Angeles. I'm kind of excited for that one ;).