It is not Clark. It is by Stanley Burroughs, the book is The Master Cleanse. You can get info on the Master Cleanse Forum . I actualy did the Ultimate Cleanse, which adds Bentonite and phyillium shakes (B&P shakes) and also a parasite cleanse to the MC. Some people on the Master Cleanse Forum are against adding the B&P shakes because they can be dehydrating and suck up all the nutrition in the lemonade. I did fine on it, but I drank 1 oz of water per 2 lbs of body weight, and drank lots of the lemonade. I passed alot of mucus plaque and it was from the B&P shakes. Here are some links for you, there is alot more info if you look on the Master-Cleanse forum. http://www.prostate90.com/program/ultimate_fast.html http://www.falconblanco.com/health/cleansing/lemoncleanse.htm
I think there is also a website on Stanley Burroughs book if you try a search for it.Good Luck and be sure to do some homework before you decide what to do.