Susan is suddenly back into Dresden's life, and her return turns his life upside down. Seriously upside down.

Anything else I may say may be a spoiler, so I just want to write that this is my favourite Dresden story yet. It is amazing that Jim Butcher is able to use the same formula but twist it in amazing ways. He keeps it compelling and the twists never stop coming. What a wonderful series, and an incredible set of characters.