Nobody walks - Mick Herron

Tom Bettany is working at a meat processing plant in France when he gets a voicemail from an Englishwoman he doesn't know telling him that his estranged 26-year-old son is dead - Liam Bettany fell from his London balcony, where he was smoking dope. Now for the first time since he cut all ties years ago, Bettany returns home to London to find out the truth about his son's death. Maybe it's the guilt he feels about losing touch with his son that's gnawing at him, or maybe he's actually put his finger on a labyrinthine plot, but either way he'll get to the bottom of the tragedy...