Hawley has also invested potentially tens of thousands of dollars in the very companies he denounces, according to public financial disclosure records examined by the Guardian. Hawley’s new book, The Tyranny of Big Tech, is published next week by Regnery Publishing. Simon & Schuster, its original publisher, dropped the book following the Missouri senator’s involvement in the 6 January electoral college vote certifying Joe Biden’s election. In the book Hawley compares today’s tech titans to the “robber baron” industrialists who dominated the US economy in the 19th century, whose monopoly powers were attacked by president Theodore Roosevelt, the subject of a previous Hawley book.