Clockwork Princess by Cassandra Clare

Tessa Gray should be happy—aren't all brides happy? Yet as she prepares for her wedding, a net of shadows begins to tighten around the Shadowhunters of the London Institute. A new demon appears, one linked by blood and secrecy to Mortmain, the man who plans to use his army of pitiless automatons, the Infernal Devices, to destroy the Shadowhunters. Mortmain needs only one last item to complete his plan. He needs Tessa. And Jem and Will, the boys who lay equal claim to Tessa's heart, will do anything to save her.

Warning, this review may contain spoilers for previous books in the series.
 
This is it, the final installment of the Infernal Devices. I launched myself straight into it, literally immediately after Clockwork Prince. I could not wait to find out what happened next with everyone. And as I expected, Clare did not disappoint. We went from battling a giant demon worm - both hilarious and terrifying - to the final dramatic clash with Mortmain. Tessa was kidnapped, Will runs away to save her while Jem's on his death bed. Add in the threat of Charlotte losing the Institute and you have one incredible book.

We learned much more about the characters, new and old; I completely fell in love with Charlotte and Henry and their relationship, and it was both weird and adorable seeing Cecily and Gabriel. Then of course there was the complex relationship of the trio; I wanted everyone to be happy and it was quite heart-breaking seeing Will around as Tessa and Jem prepared to get married. Speaking of which, this part of the story was quite emotionally driven; considering this is the final book, it wasn't hugely action-packed but it was still an amazing story. I honestly couldn't put it down as we went from London to middle of nowhere Wales to fight Mortmain and his robotic army. 

Now, the ending. After Mortmain has been destroyed once and for all (which was amazing by the way), the final few chapters were like a goodbye. While it was quite long, I liked that the whole summary and happy endings weren't rushed; the characters' futures weren't left to chance and speculation, I for one needed to know that. And finally, one last thing, because trust me I could gone on for quite a while otherwise: I really need to read the Mortal Instruments series now to understand all the references!

Published 5th September 2013 by Walker Books.