Today you can get Amazon's Kindle edition of "The Souls of Black Folk" by W. E. B. Du Bois for free, then add the Audible Narration for only $.99. This is the deal of the day on Audible's site for $2.95, but through Amazon you can get it for much less. Rated 4.5/5 stars from over 300 Amazon shoppers.
The Souls of Black Folks, as other reviewers have pointed out, is a masterpiece of African-American thought. But it is even more than that when we consider the context and time in which the book was written. Most of what DuBois discusses is still relevant today, and this is a tribute to the man, not only as a scholar, but as someone who was continually adapting his views in the best image and interests of black people.