Lethal White by Robert Galbraith
It's funny, when I saw Lethal White was out, I had to pick it up. I remember loving Cormoran Strike, the detective, and really enjoying the novels. I apparently had absolutely erased Career of Evil (#3) from my mind. Looking back at my review for that one, I almost DNF'ed it, but finished only because, well, I love Cormoran Strike. That's fine, because Lethal White was a return to the series I enjoy.
The mystery begins, as the blurb states, with a young man's visit to Strike's office. The young man, Billy, clearly has mental health issues, but he also clearly believes he saw a child strangled years earlier. Separately, Strike is hired by Jasper Chiswell, the Minister of Culture, who is being blackmailed by Jimmy Knight, Billy's older brother, and Geraint Winn, the husband of the Minister for Sport. Chiswell wants Strike to get dirt on Winn and Knight that he can use against them, but won't tell Strike what information...