From the author of Thirteen Hours - A Sunday Times '100 best crime novels and thrillers since 1945' pick

I'll shoot a policeman every day until you arrest the murderer of Hanneke Sloet.

Shortly after the South African Police Services receive this threatening email, a policeman is shot by a sniper and recovering alcoholic Benny Griessel is ordered to reopen the Sloet case.

Hanneke Sloet was a sensual and ambitious lawyer. At the time of her murder she was working on one of the biggest Black Empowerment deals in South African history. She was found dead in her luxury Cape Town apartment, a single stab wound to her chest.

After forty days, the trail has gone cold. The first investigation could find no motive and no leads, only a set of nude photographs, an ex-boyfriend with a rock-solid alibi, conniving attorneys and financial double-dealing.

Benny has to deal with immense pressure from his superiors, the media and the unfathomable sniper, whose emails keep coming and who won't stop shooting. And then there's Benny's love interest, former pop sensation Alexa Barnard, who is also trying to rebuild her life after the ravages of alcohol, and Benny has to make sure she stays sober for her comeback.

At the same time, Benny's feisty colleague, Captain Mbali Kaleni, is hunting the shooter, trying desperately to find what connects him to Hanneke Sloet.

Both Benny and Mbali are about to endure seven days of hell.