Morning, Noon and Night by Sidney Sheldon

A power revered by presidents and kings, a fortune unsurpassed by few people on earth: all that ended for Harry Stanford the day he mysteriously ??and fatally ??plunged from his luxury yacht into the Mediterranean Sea. Then, back home in Boston, as the family gathers to grieve for his memory and to war over his legacy, a stunningly beautiful young woman appears. She claims to be Stanford's long-lost daughter and entitled to her share of his estate. Now, flaming with intrigue and passion through the glamorous preserves of the world's super rich, the ultimate game of wits begins, for stakes too dazzling and deadly to imagine.