A serious problem with U.S. antitrust law today is that big monopolistic firms like Amazon.com Inc. are wielding too much economic power, but general counsel and their companies hold a key to changing that, according to antitrust expert Christopher Sagers.

Sagers, an author and professor at Cleveland–Marshall College of Law, has written a new book, “United States v. Apple: Competition in America” under Harvard University Press on sale Sept. 19. The book is a study of the 2014 e-books price-fixing case involving Apple Inc. and five publishers in an effort to break up Amazon's dominance in the market.

United States v. Apple, by Christopher Sagers.

Before teaching, Sagers practiced law for four years in Washington, D.C., first at Arnold & Porter and then at Shea & Gardner.