I'm afraid he's not (that was pretty much Milton Friedman's position as well as all of his UChicago fellow, which is the reason why we're back to the gilded age with robber barons all around)
Not familiar with any particular book called that way.
The “Robber barons” is a phrase that have been used since the late 19th century, and the fact that the American economy had become toxically concentrated in the hands of a few back then really isn't something contentious.
