Best book of TID AND TMI. Extremely well written. I was upset a little that Tessa wasn't truly the main character until the very end - the book switched between almost every character throughout the novel but that's what made me so invested in every person's story.

SPOILERS

I got home from work at 3:30 yesterday and spent the next 3 1/2 hours finishing Clockwork Princess and pretty much bawling my eyes out for the last 100 pages. I learned my lesson when I read Jem and Will's goodbye scene while I was at a music rehearsal and almost couldn't hold it in. Tessa and Will's love story was the most beautiful thing I have ever read and any time I have to read about someone dying in great and beautiful detail I just lose it. And I did. So many tissues. And WHAT AN EPILOGUE. I hope hope hope we get to see Tessa and Jem in a future TMI or TDA book. That ending was too good to be true.
The best thing comment I've read about this book is that the love triangle is different and we care about it because they all ship the other two. And it's true! I just loved this series and this book and now I'm going to have to reread TMI both because of the upcoming movie and so that I can look for hints of lineage and such.
Love.