Who wrote a 2014 book about the owners of the  second-largest privately owned company in the United States?
Sons of Wichita: Sons of Wichita: How the Koch Brothers became America's most powerful and private dynasty (2014) is a non-fiction book written by the American journalist Daniel Schulman about the wealthy Koch family and their political activities. Koch family: The Koch family ( ) is an American family engaged in business, most noted for their political activities and control of Koch Industries, the second-largest privately owned company in the United States (with 2013 revenues of $115 billion).
Daniel Schulman