** spoiler alert ** 
 In book 5 of The Mortal Instruments we see Sebastian back in action alongside Jace because of the bonding ritual that took place in Book4, where Lilith, a Greater Demon, performed the ritual to unite Jace and Sebastian and bring Sebastian back to life (or did he even die? I don't remember.. It was all so confusing). 
 The key area here is that you cannot harm one without harming the other, and in this case Jace and Sebastian have disappeared in book 4. In book5, it is up to Clary&Co. to find them. 
 Let me just say that this book was quite boring when it comes to actual events. I had to spend half the book reading about the emotional and physical attraction Clary has for Jace. I mean, chapters and chapters of her ogling him and forgetting her name and thinking of how lovely it is to kiss him.. OH MY GOD AND THEN WHAT? MOVE ON WITH THE STORY. 
 I have spent 5 books hating Clary and her silly whiny personality and I am sure I am not going to like her at all in the final installment, which I will be beginning today hopefully. 
 Magnus, Alec, Isabelle, Maia, Jordan: all of them were quite boring and there was nothing significantly important about their scenes except for them all loving each other and whatnot. WHAT? WHERE'S THE ACTION? 
 One of the major chapters of the story was when they were trying to raise the Greater Demon Azazel and the Angel Raziel... which I had expected to be MUCH MUCH MORE INTERESTING and unfortunately turned out to be very bland and boring. I was really hoping these chapters would shed light on so many different aspects of Nephilim. Nope, all we got were lame jokes and statements and, oh yes, Simon's Mark of Cain removed, which I wasn't impressed with because Simon was much more interesting with the Mark. 
 ALSO! SIMON is the one who went through all that trouble to get that Glorious sword, and then Clary just swoops in and takes it and uses it to suck all the evil out of Jace. 
 Boring. 
 BO-RING! 
 Oh and since they had that epic battle between Nephilim and those turned-shadowhunters and no one managed to grab Sebastian :) What a bunch of losers. 
 Oh and Magnus and Alec? Separating because of that SILLY EXCUSE? Ok so Alec wanted to turn you mortal.. SO WHAT? Did he do it? NO, so let it go! No, Magnus had to be all hoity toity and ruin things between them, not that I was rooting for them in the first place. 
 Anyhoo, here's hoping the final installment will be much better than kissy kissy scenes between Clary and Jace. If I wanted useless teenage drama I COULD HAVE READ USELESS TEENAGE BOOKS. 
 >:@