"The Bond King" by Mary Childs is a biography of Bill Gross, who is known as the "Bond King" in the investment world. The book tells the story of how Gross turned from a gambling college graduate into one of the most powerful and influential figures in the bond market. It details how he founded Pimco, one of the most successful and secretive investment firms, and how he helped reshape the financial system in the aftermath of the Great Recession. The book also covers Gross's rise to fame, the strategies that made him successful, and his downfall. The author, Mary Childs, argues that to understand the winners and losers of today's money game, one must understand the bond market and Bill Gross, the Bond King.