This in-depth and holistic three-book series covers practical, hands-on experience and knowledge of the safe and scientific use of essential oils. Discover inside the typical structure and function of the body (anatomy & physiology), the abnormalities of how common diseases (pathophysiology) affect human physiology, and how the use of essential oils, herbology, nutrition, and lifestyle changes can bring balance to the physiology and alleviate the symptoms of disease and imbalance. Chapter 1 through 11, discover the true essence of aromatherapy beyond trends and fragrance. Earth Treasures takes you on a grounded, insightful journey into the science, chemistry, and spirit of essential oils. Learn how each drop carries complex plant intelligence, explore the relationship between molecular structure and therapeutic action, and gain a deeper respect for the art and ethics of distillation. This foundational guide bridges nature, science, and soul-perfect for students, practitioners, and anyone seeking authentic, holistic aromatherapy knowledge. This volume covers in depth 30 essential oils with 10 categories The information within is for your reference, research, and a mind and body wellness guide. Dr. Debrah Zepf, Ph.D., has over 30 years of experience in the alternative, complementary health field.Approved educator for level 3 clinical aromatherapy by the National Association for Holistic Aromatherapy (NAHA) Clinical Aromatherapy course approved by the Alliance of International Aromatherapists (AIA) Recognized by the National Therapies Certification Board (NTCB)