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 I absolutely loved this book, it was beautifully written, the narrative was shared between the characters perspectives really well and I loved the setting and the plot twists (as painful as they were at times- thinking Jem was dead in particular broke my heart into a million pieces). I generally think love triangles are a tired and overused device in YA fiction in recent years but the Will/Tessa/Jem plot line was an exception, mostly due to how it was written, you understood Tessa's motives at every turn. 
 But the thing I loved most about this book (except from Magnus/Henry friendship, which was frankly perfect) was the depth with which Cassandra Clare explored Will and Jem's relationship. There is no doubt in my mind it was the most important relationship in the series and i love how it took centre stage for the majority of the story, it gave me a much clearer understand of just how deep the parabatai bond really is. 
 The ONLY thing I take issue with was the dreaded epilogue. Words cannot describe how much I despise epilogues. Particularly epilogues that describe events happening far in the future. I have read this series, and I have loved the characters. I much prefer deciding for myself how their lives will pan out when I stop turning the pages, I don't want or need you telling me. Third time I have been seriously disappointed in the end of a series I have loved so much. Even so, I have to admit it was pretty beautiful.