Another recommendation from a librarian. I started on the fourth book because they didn't have the first three.

This was a nice but unexceptional mystery. The main characters obviously have a history and are engaging, although in this book they are uncomfortable around each other after having slept together in a previous story.

The ancillary characters are also well-drawn, but fit into standard tropes so you don't have to think too hard.

I wouldn't mind reading the earlier books to see how the characters develop. It's not challenging, but a fairly standard British police procedural. It's a pleasant read for when you just want to enjoy the story and not feel like you just wrestled a book.

My biggest beef with the story is when the author reveals that a main character has a revelation, but doesn't let us in on the insight. This is a fairly common device in mysteries, but I really enjoy solving the mystery with the main characters, rather than just watching them solve it.