The Three Evangelists by Fred Vargas
The first Vargas book I read was Seeking Whom He May Devour, which I loved, and the reason I picked it up was because I liked the cover, well, this one doesn’t have quite such a gripping cover, but it really did grow on me. It is quite simple, just a tree picked out by a shaft of light in a garden, everything else is half hidden in the darkness. It really suits the story.
As I’ve mentioned before characters are what make, or break, a book for me. And this book has great, if slightly odd, stars. Eccentric is probably the polite term.