"Clockwork princess" is the third and final book in the "The infernal devices" trilogy by Cassandra Clare. You can read more about the books of one of my favourite female authors Cassandra Clare here.
I would say that it is pretty hard to write a review of a final book in a series. I personally hate spoilers. I read by accident in a magazine that Dumbledore dies in the sixth Harry Potter book and this totally ruined the reading experience for me. I will try to do my best not to reveal too much of what happens in "Clockwork princess".
In the final book of "The infernal devices" series the truth about Tessa is finally revealed. Actually everything is revealed by the middle of the book. I find this book by Cassandra Clare to be the most romantic one among her books. A big part of it is dedicated to the love problems of the main characters. In this final part of the story we find out more about another character from "The Mortal instruments" series brother Zachariah.
I would say that "Clockwork princess" is my favourite book of "The infernal devices" series. I still prefer though the other Cassandra Clare series "The Mortal instruments" and I highly recommend it. Just a few days ago I found out that there is going to be a movie based on "City of ashes" next year. I wasn't impressed by the movie version of "City of bones" although I liked the actors and especially Lilly Collins. There is going to be another series by Cassandra Clare about the shadowhunters in 2015 and I can't wait for it.