It's becoming more and more difficult to find books about animation that tap into primary sources (i.e. interviews with the artists) for their research and this for obvious reasons (most of the "old-timers" have passed away), so The Colored Cartoon: Black Representation in American Animated Short Films by Christopher P. Lehman is definitely a book I will pick up, since its author will quote from his interviews with Berny Wolf, Bill Littlejohn, and Jack Zander.