I recently noticed the video below on the official Star Wars YouTube channel, and I immediately popped over to Amazon.com to put The Making of Star Wars: Return of the Jedi into my wish list (it's set for release on October 1, 2013!).
I've read both of J.W. Rinzler's other existing Making of Star Wars books (Episode IV, Episode V), and I thoroughly enjoyed both of them (read my review of The Making of The Empire Strikes Back here). I can't imagine Episode VI's book being any worse!