Gambling Man is the biography of one of the world's least known but most consequential investors. Japan's Masayoshi Son has made and lost several fortunes, investing or controlling assets worth $1 trillion in the past two decades through his media-tech giant, SoftBank. He bankrolled Alibaba, China's internet colossus, before the world had heard about it; plotted with Steve Jobs to turn the iPhone into a wonder product; and financed hundreds of tech start-ups, fuelling the biggest boom Silicon Valley has ever seen. This book takes you on Son's wild ride, from his birthplace in a Korean slum in post-war Japan to the modern-day temples of power. It speeds through Donald Trump's golden skyscraper in Manhattan, the royal palaces of Riyadh and the throne rooms of China's Marxist rulers; all places where Son has deployed his unique blend of financial engineering and crazy risk-taking.