John McWhorter's newest book is called The Power of Babel: A Natural History of Language. He has written on Ebonics, language and African Americans, and the origins of the Creole Language. His other books include Losing the Race: Self-Sabotage in Black America and Word on the Street: Debunking the Myth of 'Pure' Standard English. McWhorter is a professor at the University of California at Berkeley.