Ayana Mathis, author of the best-selling novel "The Twelve Tribes of Hattie" about an African-American family in Philadelphia, talks about her work and career with host Richard Wolinsky. Ayana Mathis is a graduate of the Iowa Writers’ Workshop and is a recipient of the Michener-Copernicus Fellowship. The Twelve Tribes of Hattie is her first novel. From the series Bookwaves