Is Page Six to be blamed for the worldwide fame of Andy Warhol? This shocking allegation is made in the new book, “Pop: The Genius of Andy Warhol,” by Tony Sherman and David Dalton. The pop artist died in 1987 as “the world’s most famous contemporary artist; since then his fame has only grown. Perhaps the better part of his posthumous ubiq uity derives not from his art . . . but from the ’70s and ’80s self- promotion that fixed the image of the ashen-faced, moth-like ghoul in the collective mind’s eye . . . his omnipresence on the New York Post’s Page Six,” the book states. “He had loved rubbing elbows with the world’s socialites, Page Six’s denizens: Halston, Diane von Fur stenberg, Yves Saint Laurent, Bianca and Mick, Liza . . . Imelda Marcos and the Pahlavis.”