You need to buy

Fasting and Eating for Health, Joel Fuhrman, M.D.
The Miracle of Fasting, Bragg ( a used, old copy is best from WWW)

You can get these books from many sources including Amazon.com.
There is no step by step on the site. Water Fasting has a lot of twists and turns in it. But start by reading all hopinso posts.
Mike