Instruct: Classify Amazon reviews into positive or negative sentiment
Query: this book is groundbreaking

I really enjoyed this book. Excellent. Its good to see research being put out there for someone like myself to read so I can understand what I can do for my health and whether I should be worrying about my bones disintegrating if I dont drink gallons of milk each day. I am glad to find that I can relax and eat a healthy balanced diet. I always was suspicious of the drugs offered to help prevent osteoporosis because of the side-effects. Its kind of a relief to know that I can continue to eat well and keep fit and working out, and that this will be beneficial for my bones - help me stay in one piece. I am tired of the fear that is induced by faulty informtion about 'diseases' part of which is fictional and created by drug companies for their own financial purposes.So I am grateful to a book that provides some clarity about the actual disease of 'osteoporosis' and also gives solid ideas of what to do to keep bones healthy.