About the Book: The Billion Dollar Secret: 20 Principles of Billionaire Wealth and Success by Rafael Badziag offers unparalleled insights into the mindset of self-made billionaires. Through exclusive face-to-face interviews with over 20 entrepreneurs—including Manny Stul, Mohed Altrad, Cho Tak Wong, Tony Tan Caktiong, and N. R. Narayana Murthy—the author distills their experiences into 20 mental principles that propelled them from humble beginnings to creating vast empires. The book serves as a roadmap for aspiring entrepreneurs, providing actionable strategies to emulate the success of the world’s most accomplished self-made billionaires.