Mila, a part-automaton is struggling to find her place in the world, especially with the criminal mastermind, Jack Dandy, not seeing her as woman, she decides to leave his house in search for independence. Meanwhile whilst stopping a killer, Griffin is taken to the Aether and is held captive by his archenemy The Machinist. Finley, along with her friends, find that the only way for them to go into the Aether to free Griffin is for Finley to temporarily die. With The Machinist determined to destroy Griffin, body and soul, Griffin must confront his greatest fears but will he survive the destructive power within him.
The Girl with the Windup Heart is the really good final book in the steampunk chronicles, which is very fast paced with non-stop action and romance. There are 2 stories going on at once in this book and while I enjoyed Jack and Mila’s it felt like it should have been in a separate book or novella, as it was distracting form the main story.
Mila is a likeable character as she is a naïve and innocent young woman who, during this story, learns about both herself and others. In this book we got to see a different side of Jack as he was caring and protective. Both Finley and Griffin are the same from the other books, as they were strong and loyal, and were willing to do anything to save each other.
I really enjoyed this series and I hope Cross writes more books like this in the future. I would recommend The Girl with the Windup Heart and the whole series to fans of YA steampunk.