Marc Lewis is a neuroscientist and professor emeritus in developmental psychology, having taught at the University of Toronto for over twenty years and at Radboud University in the Netherlands for six. He is the author or co-author of over 70 journal publications in psychology and neuroscience. In his first book on addiction, Memoirs of an Addicted Brain (2011), he connects his own years of drug use with an account of how the brain changes with addiction. In the second, The Biology of Desire: Why Addiction is Not a Disease (2015), biographies of addicts are linked with neuropsychological findings to show how addiction develops and how it can be overcome. Both books have been published in several languages. Lewis currently writes for the popular press, maintains an active blog, sees clients in psychotherapy, and speaks internationally on the science, experience, and treatment of addiction.