The 50th Law is a New York Times bestselling book on strategy and fearlessness written collaboratively by rapper 50 Cent and author Robert Greene. The book is a semi-autobiographical account detailing 50 Cent's rise as both a young urban hustler and as an up-and-coming musician with lessons and anecdotes from historical figures such as Abraham Lincoln, Sun Tzu, Socrates, Napoleon, Malcolm X, and James Baldwin.

Curtis James Jackson III, known professionally as 50 Cent, is an American rapper, actor, television producer, and businessman. Born in South Jamaica, a neighborhood of Queens, Jackson began pursuing a musical career in 1996. In 1999-2000, he recorded his "debut" album Power of the Dollar for Columbia Records, however he was struck by nine bullets during a shooting in May 2000, causing its release to be cancelled and Jackson to be dropped from the label. His 2002 mixtape, Guess Who's Back? was discovered by Detroit rapper Eminem, who signed Jackson to his label Shady Records, an imprint of Dr. Dre's Aftermath Entertainment and Interscope Records that same year.