The book Sex is a book by the singer Madonna. It was released on 21 October 1992. It covers topics like sadomasochism, sex, pornography, adult content and sexual simulation. Madonna wrote the book as a character named Mistress Dita. "Sex" had 128 pages plus a warning. Others involved in the book include Naomi Campbell, Vanilla Ice and Isabella Rossellini. The book was controversial for a lot of reasons. One was that the book was not allowed for sale to anyone under the age of eighteen. The book became a very major hit.