April 16, 1973: from Publishers Weekly

Grosset & Dunlap was founded in 1898 and, after having numerous owners, is now a children’s imprint of the Penguin Group. In April 1973, however, it announced its planned September publication of a very adult book: Norman Mailer’s biography of Marilyn Monroe. Plugged as “the book of the year” by G&D, the 256-page bio featured more than 100 photos and was priced at $19.95.