Here is another good book to feast your eyes on as you embark or maybe as you are already on your natural black hair journey.
Grow It! by Chicoro
There is a simple six step process described in this book which helps you understand things you need to do in order to gain healthy long hair as well as things you should not do. Who says black natural hair cannot achieve great lengths? Knowledge is power is what this book teaches. The more you know the more you grow!