Murderous Contagion tells the compelling and at times unbearably moving story of the devastating impact of diseases on humankind - from the Black Death of the 14th century to the Spanish flu of 1918-19 and the AIDS epidemic of the modern era. In this book Mary Dobson also relates the endeavours of physicians and scientists to understand and identify the causes of diseases and find ways of preventing them. This is a timely and revelatory work of popular history by a writer whose knowledge of, and enthusiasm for, her subject shines through her every word.

    This cycle is at the root of all addictions, addictions to drugs, sex, love, cigarettes, soap operas, wealth, and wisdom itself. But why should this be so? Why are we desperate for what we don't have, or can't have, often at great cost to what we do have, thereby risking our peace and contentment, our safety, and even our lives?"The answer, says Dr. Marc Lewis, lies in the structure and function of the human brain. Marc Lewis is a distinguished neuroscientist. And, for many years, he was a drug addict himself, dependent on a series of dangerous substances, from LSD to heroin. His narrative moves back and forth between the often dark, compellingly recounted story of his relationship with drugs and a revelatory analysis of what was going on in his brain. He shows how drugs speak to the brain - which is designed to seek rewards and soothe pain - in its own language. He shows in detail the neural mechanics of a variety of powerful drugs and of the onset of addiction, itself a distortion of normal perception.Dr. Lewis freed himself from addiction and ended up studying it. At the age of 30 he traded in his pharmaceutical supplies for the life of a graduate student, eventually becoming a professor of developmental psychology, and then of neuroscience - his field for the last 12 years. This is the story of his journey, seen from the inside out.