THE INFERNAL DEVICES WILL NEVER STOP COMING 
 MAY GOD HAVE MERCY ON OUR SOULS. 
 Mortmain is growing closer and closer to finally getting what he wants and needs to complete his army - Tessa. He intends on using his army of machines, the Infernal Devices, to destroy the Shadowhunters and all that they stand for. Jem and Tessa may be engaged but Will is still just as much in love with her as ever. They both will do anything to keep her safe and away from Mortmain. 
 I enjoyed this series so much better than The Mortal Instruments series! I fell deep into the world this time and fell even more in love with the characters that were within it. The ending and wrap up couldn't have been more perfect. 
 (view spoiler)[ 
 Well goodbye Benedict that's what you get for acting like a demon - you turn into one and get killed by your own sons! Mr. Lightwood's demon pox took the best of him this book and he turned into a nasty demon worm that wanted to eat anyone and everything including his own children. 
 Jem's yin fen has run out in the downworlder drug trade thanks to Mortmain and his use of wolves for round the clock work. No drugs for Jem though mean that his days are running short and Will is on a drastic search to save his parabati. 
 Mrs. Dark comes and kidnaps Tessa from the institute with the help of her clockwork creatures. Jem gets severely injured in the process leading him to his death bed. He asks Will to go after Tessa and save her after finding out that Will's love for Tessa runs just as deep. 
 While Will is out searching for Tessa his parabati rune turns silver and he knows that Jem has died. While he's mourning though a stupid pack of wolves attempts to attack him and Will fights back like he doesn't care any longer if he lives or dies. Eventually he finds his way to Tessa where they get their freak on after he tells her of Jem's death (neither of them knew he was a silent brother at this time). I don't know about you but that's not right. Like she seriously found out minutes or hours ago about the death of her fiance only to have sex with his best-friend....I know you guys also cared for each other this entire time but dang....Mortmain has also with the help of Tessa forcibly turning into Mortmains father given him what he needs to turn his clockwork army into a demon army with minds of their owns. It's scary and intense stuff. 
 Henry also has his machine working which allows Shadowhunters to be transported to wherever they desire as long as they've been there before. With the help of Cecily they get transported to the mountain in which Will and Tessa are being held captive by Mortmain. Only for Tessa to turn into her very own clockwork angel that she wore around her neck all her life and kill the magister. Badass! (hide spoiler)] 
 The epilogue oh my gosh. So many tears. I cried the entire time. 
 Most people are lucky to have even one great love in their life. You have found two.