The book is about the American investor Robert W. Wilson who during the 1960s to 1980s competed with Buffett and Soros for the place as the world’s best investor. In 1969, he started the hedge fund Wilson & Associates, where he almost exclusively managed his own money. He started with $15k which he inherited from his mother and had $800m at the end of his life. During his career, he had an annual return of 28%. Before he took his own life in 2013, he donated pretty much his entire fortune to charity.
A summary of the book can be read here.