Question: The 21 Irrefutable Laws of Leadership: Follow Them and People Will Follow You is a 1998 book written by John C. Maxwell, professional basketball player Harrison Barnes read and spoke positively of the book, Harrison Bryce Jordan Barnes (born May 30, 1992) is an American professional basketball player for the which city's team, of the National Basketball Association (NBA)?
Sentence (from "The 21 Irrefutable Laws of Leadership"): The book had sold more than one million copies by 2015.
Relevant evidence: No