Yes, please read Book I and try the fast for yourself. I've been reading here for awhile and did the pre-cleanse herbs first, then did a 21 day OJ fast. The results were nothing less than phenomenal. Read the many testimonials here on the forum.
The beauty of the OJ fast - it's truly amazing how something so seemingly simplistic is so healing and rejuvenating. Once you try it, you understand so much more about your body and respect it more. That mindset propels your path forward, while you plan any subsequent fasts you may undertake since you understand them better.