One of the things I love about the Parasol Protectorate series is how Gail Carriger parodies different types of Victorian literature with each volume. Heartless is the Sherlock-Holmes-style mystery of the group and boy is it a good mystery! I certainly didn't figure any of it out.
Due to certain circumstances that occur throughout the third book, which I will not spoil for those who have not yet read it (though what are you waiting for?!), Alexia takes up residence in a town house next door to Lord Akeldama (delightfully foppish rove vampire), or so it will appear to the everyone. She's actually residing in Lord Akeldama's second best closet. However, not long after moving in they are alerted to a plot to kill the Queen and thus, as muhjah, Alexia embarks on a hunt to solve the mystery.
As I said, the mystery is a good one, particularly as it reveals some very interesting facts about Alexia's father and about an assassination attempt that fans may remember being previously mentioned. It's also lovely to be back in London again with both the werewolves and vampires of the town. Whilst I loved Changeless and Blameless, I did miss the Westminster Hive and the interactions between Conall (when he's sober) and his pack. Speaking of pack interactions, we really get a closer look at the relationships of the Woolsey pack, which is something I really enjoyed, especially with how Conall is trying to handle the unexpected new member they gained at the end of Blameless.
The story's climax is brilliant. It is full of drama with so many things happening that you just can't put it down because you want to know how it is all resolved. There were some things I found a little sad (don't worry; it's not what you might think!) but at the same time I am desperate to see how the new situation that arises from it will play out in the final instalment. Timeless cannot come out soon enough!