I very nearly sent this one back to the library about a quarter of the way into it. I‘ve read enough Candlish to expect unreliable narrators and wild twists. I kept going and I‘m glad I did as I liked it in the end. I should have written down all the theories I had at that quarter way mark - I reckon about half of them were right, but there was more I hadn‘t thought of, and besides it’s the excellent characters that make these, not the twists.