Lesson in Mastery book has been on my ipod for a couple years now and is absolutely a must listen! This is a very powerful book that breaks down your life into pieces. Basically most of this book talks about your mindset, how to strengthen your inner self, and eliminating doubt and disbelief. I have probably listened to this over 25 times already. Out of all the books I’ve read and listen to this book is probably in the top 5. I specifically enjoy 2 chapters and tend to re-listen to the same 2 chapters over and over again. This is a very motivational book and is definitely a must read! I can actually say I learned a little more about people and myself. In a nut shell Tony Robbins takes psychology, philosophy, and anatomy, merges them together, and delivers fun material that is worth listening to. It’s good stuff!