I was somewhat skeptical when I had heard about the book "freestyle" by Carl Paoli. I assumed it was just another book about some "crossfit" style stuff and would lack much substance. I was wrong. Freestyle is a very good breakdown of a few basic moves.
Carl builds the book on 4 basic movements. The pistol, the handstand push up, the muscle up and the burpee. Where I think the book shines is several different progressions for each. Some are very creative and I can't wait to try them out. For example, the use of bands around the waist to take some bodyweight off as you proceed to attempt a handstand off paralette bars.
I believe the book "Overcoming Gravity" does a little better job of breaking down some progressions for things like front levers better, but this has better visuals in terms of real human pictures. The book is massive. I think there is to much writing. That may be more my "pet peeve" then anything though. I just want the info. A picture is worth a thousand words. This book, you get the picture and the thousand words.
If your goal is to master one of these four moves or you want to be able to help someone achieve better movements in these 4 exercises, then it's worth your money.