My brother who has some health issues lent DDDL to me.One of the best reads I have had the opportunity to have a look at. Joel Wallach is an unreconigised pioneer of treating animal diseases that are largely caused by mineral difficiency. He began questioning orthodox treatment of disease in humans and found the remedies he used on animals could be used to treat humans and at a fraction of the cost.An incredably entertaining and educational read that is one of my most memorable..So good I am buying my own copy to lend to friends with medical issues