There was a lot going on in this book, and we learned a lot more about Robin and Strike than the trickles of information from the previous books. Their relationship shifted slightly and we finally had acknowledgement of the sexual tension between them, although we’re still left without any relief or hope that anything will ever happen.
It's been a while since I've read such an intriguing mystery, and a good one like this always leaves me wondering about the author's state of mind. Surely you've got to be a little bit off a psychopath to be able to come up with such fantastically mysterious murders!?