I figured it out - The Book is "Can't Stop, Won't Stop:A History of the Hip-Hop Generation" by Jeff Chang. Compare the shots at the start of Episode 5 with the Amazon pic of the back of the book under the cover photo - same red and black split in the writing with a pic in the bottom right quadrant. https://www.amazon.com/Cant-Stop-Wont-History-Generation/dp/0312425791/ref=pd_sim_14_5?ie=UTF8&pd_rd_i=0312425791&pd_rd_r=RZ874D15NRRTT9QFYS8E&pd_rd_w=l1xFb&pd_rd_wg=i3BOb&psc=1&refRID=RZ874D15NRRTT9QFYS8E