Beginning of the book a little tedious to finally get to the practical question of liver cleansing. It takes 48 hours of release time or a weekend. Just take him to work his apple juice liter in the previous days. From the first course, I have removed fifty calculations painless but certainly tired .It very well explained. I actually feel better and has again a cure in a month. I highly recommend reading this book before starting for reassurance and understanding of the functioning of the liver and the gallbladder it is important not to remove if we have a way to evacuate the calculations. Why doctors do not they use this simple method?