I didn't want to stop reading this, found it a real page turner, and consequently I had very little sleep last night! Even though I felt, towards the end, it stretched a little too far into the realms of extremely unlikely to happen, by that point I was so invested I didn't really care! It's difficult to talk about without giving away massive plot spoilers, so I will just say that I hadn't a clue what was happening, but as it all started to pull together it became really exciting. I really liked the Detective, and I would've liked even more about her to be in the book. Maybe she'll come back in the future to investigate something else?
I had absolutely no clue this was a sequel until I got to the author's note at the end, but it works perfectly well as a standalone novel.

With thanks to NetGalley for my copy.