4 authors — #

37signals is a Chicago-based software company founded by Jason Fried, Carlos Segura, and Ernest Kim.

Curtis '50 Cent' Jackson is an American rapper, actor, and entrepreneur recognized for his influential career in music and business.

Robert Greene is an American author known for his books on strategy, power, and human behavior, including The 48 Laws of Power and The Art of Seduction.

[unknown] is the author of "Genesis" and a recognized voice in classics.