When we last saw Robin Ellacott and Cormoran Strike, they had solved a high profile case, and Robin was preparing to marry her longtime boyfriend, Matt. When a troubled young man named Billy comes to the agency with a memory of a murder from years ago, Strike is intrigued. Soon it emerges that there are connections with another case that Strike and Robin are working, and they are off on a labyrinthine chase through the upper classes, anarchist cells, and the houses of Parliament. This is the fourth and longest of the Cormoran Strike books, and lots of fun.