The 50th Law (Harper Studio) The author of the bestselling The 48 Laws of Power will discuss and sign his newest book, cowritten with 50 Cent, The 50th Law. Robert Greene is a self-described history nut with a degree in classical studies. He has worked in New York as an editor and writer at several magazines including Esquire and in Hollywood as a story developer and writer. He is also the author of The Art of Seduction, The 33 Strategies of War, The 48 Laws of Power, and The 50th Law, and lives in Los Angeles.