Proof — Dick Francis

Wine merchant Tony Beach is no stranger to personal tragedy--or to the world of fine vintage wines. But when hidden hit men literally--and brutally--crash a society party he has, as usual, expertly catered, Tony finds himself caught in the terrifying midst of a mystery that begins with sham scotch and counterfeit claret and escalates to hijacking and murder. Strong drink indeed for a man of otherwise peaceful pleasures who must draw on every reserve of hidden courage to crack a sophisticated scam and to save many lives--especially his own.