Did you know America still leads the world, with 735 billionaires worth a collective $4.7 trillion, including Elon Musk, who tops the World's Billionaires list for the first time? China (including Macau and Hong Kong) remains number two, with 607 billionaires worth a collective $2.3 trillion. Buy this book to gain more insights on the world's richest men and women with details and further regards to their source of wealth.