content: I wasn't sure if I needed yet another Napolean Hill program. I already had Think and Grow Rich and few other tapes that Hill had produced. And I really didn't know if I was ready for 12 hours of tapes.Now that I have bought the tape set, I can honestly say that this was one of the best investments I ever made. Hill covers the 17 principles like never before. Hill is witty and funny too.This tape set is almost like a audio version of The Law of Success. It contains live lectures done by Hill in the 50's. If you have never heard Hill do a live lecture, then you must get this set. It is outstanding. Hill is fantastic and the material is incredible.