Proof - Dick Francis

Wine merchant Tony Beach will do anything for a quiet life. But when a party to celebrate the end of the racing season ends in eight violent deaths, he is drawn reluctantly into the subsequent investigation. Meanwhile, the police, having evidence of the sale of illicit alcohol at a local club, ask for Tony's help in closing it down. Thanks to his intervention, Tony comes to the attention of the criminal underworld. And that's when he reluctantly realizes that the deaths and the illicit alcohol are connected. Tony doesn't want to be a hero. But if the choice is that or dying...