Book #3 in her excellent Cormoran Strike series. Rowling writes under the pseudonym Robert Galbraith.
Unlike most books I read, in this one are only two important characters: Robin Ellacott and her boss Cormoran Strike.
Both are damaged individuals. Both are flawed. Both are complex.
The relationship between the two drives the plotline.
In this one a killer (who loves Blue Öyster Cult) stalks Robin, whom he sees as part of his plan to exact revenge against private investigator Cormoran Strike.
In the BBC TV series Tom Burke plays Strike. And seems to have one leg missing, as does Strike in the book.