This is the fourth book in the Cormoran Strike crime fiction series. It has an absorbing plot, believable characters, and well-written dialogue. For purely personal reasons I liked the setting - southern England – and the author’s descriptions of London neighborhoods, a topic near and dear to my heart. The action moves along nicely, and the relationship between the principal characters - Strike and his employee Robin Ellacott - is tense, deep and skillfully drawn.
My one complaint is that I had difficulty keeping track of the secondary characters and how they're related to the plot, and to each other. There are so many of them. I often wanted to back up and refresh my memory. That would have been easy to do when reading on Kindle - just use the search for the character's name, and up pops a list of every time he/she is mentioned. But you can't do that with a hard copy edition, which is what I had in hand. I found myself wishing that Rowling would give us a list of characters right at the beginning, like Shakespeare did. I tried to scribble my own dramatis personae on my bookmark, together with the page number where they first appear. The list for the first 100 pages was 17 characters long. After that, I just gave up and went with the flow. It was well worth the effort.
N.B. I read the second and third books in the series (The Silkworm and Career of Evil) 10 years ago. As to when I read the first, that is lost in the mists of time. I read most of the Harry Potter books as well. Rowling, aka Robert Galbraith, is a remarkable talent.