Book Discussion. “The Warmth of Other Suns. 2-5 p.m., DuSable Museum of African American History, 740 E. 56th St., 773-947-0600, $5. Visitors will discuss Isabel Wilkerson’s book by the same title. The book can be downloaded for free at goo.gl/wue5s. Call 773-947-0600, ext. 290, for more information or to R.S.V.P.