Everyone knows about Jay Z’s cool factor; he doesn’t follow trends, he creates them — and the campaign for the launch of his new book “Decoded” will be no exception. The long-awaited autobiography is a first-person memoir mixed with detailed discussions about his most famous and provocative lyrics. “Decoded” will hit shelves on November 16, but fans will soon see pages from the book displayed everywhere; from traditional billboards to the bottom of hotel swimming pools worldwide, using a new transmedia form of marketing. Jay-Z may have taken a new age approach in advertising his book, but there’s nothing new about celebs turning into authors. Whether a memoir or self-help book, many of these stars have had life experiences that make them worth the read.