Being There by Jerzy Kosinski
The hero of this astonishing novel is called Chance - he may be the man of tomorrow. Flung into the real world when his rich benefactor dies, Chance is helped on his life journey by Elizabeth Eve, the young, beautiful, resourceful wife of a dying Wall Street mogul. Accidentally launched into a world of sex, money, power - and national television - he becomes a media superstar, a household name, the man of the hour - and, who knows, perhaps the next President of the United States of America.