Proof - Dick Francis

A party at the home of a racehorse trainer becomes a bloody tragedy when a driverless horsebox plunges down a slope into a marguee full of guests. Among the dead, Larry Trent, the rather shady owner of the Silver Moondance. Among the survivors, Gerard McGregor, private detective, and Tony Beach, a recently widowed wine-merchant.The gruesome murder of Trent s barman a few days later, closely followed by an attempt on his own life, convinces Tony Beach that, in offering to assist the police investigation, he s bought a one-way ticket to danger...