P&B is a colon cleansing drink comprised of 1 tablespoon liquid bentonite, 1 teaspoon pysillium powder mixed in 8 oz. of water. The Bentonite is a volcanic clay product that absorbs toxins, psyllium is a high fiber product that sweeps the intestines clean.
My advice to a first timer is to do The Master Cleanse alone without any extras. Do not set any unrealistic goals. Just take one day at a time. It took me six months of three to five day fasts to make it to 10 days. Others can go beyond 10 days the first time.
Perhaps while you are waiting on the book, you might want to try a one day juice fast to get the "feel" of fasting.
Good luck.