Conscious hip-hop has Malcolm Gladwell. For the more hardcore types, it’s Robert Greene.

His book The 48 Laws of Power has been namechecked by the likes of Young Buck and Kanye. In September, the power strategist published The 50th Law, a collaboration with uber-rapper 50 Cent. Bound in gilded Bible leather, the muscular motivational book contains “ten lessons in fearlessness.” Preview it using the slideshow below, or peruse the chapter headings and summaries on Greene’s potently named blog.

Good rappers are born marketers for one reason: storytelling prowess. Famous and unknown MCs alike churn out stories by the notebookful, many of which amount to artful sales pitches about why the rapper in question is the best in the game. 50 Cent’s success is a testament to his salesmanship and communication skills. Indeed, when it comes to marketing advice, you could do a lot worse than listen to a verbal entertainer who’s net worth is estimated at $440 million. (On a related note, artists like Fiddy and Chamillionaire often happen to be forward-thinking when it comes to technology.)

Like a set of bonus tracks to the book, Greene’s recent guest post for Copyblogger, Four Things 50 Cent Can Teach You About Connecting With Your Audience, provides some good tips for anyone who hopes to use social media to promote their brand. Paraphrased, the lessons are: (1) crush the distance between you and your audience; (2) open informal channels of criticism and feedback; (3) reconnect with your base; and (4) treat people’s opinions as a mirror held up to you.

50 clearly pays attention to his fans. That’s awesome. Tell him yourself what you think of his new album, Before I Self Destruct, by sending him a message on Twitter.