Marc Lewis is a neuroscientist and professor emeritus in developmental psychology. He is the author or co-author of over 75 journal publications and two books on addiction. In the first of these, Memoirs of an Addicted Brain (2011), he connects his own years of drug use with an account of how the brain responds to drugs and to trauma. 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 is learned, how it develops, and how it can be overcome. Lewis currently writes for the popular press, maintains an active blog, sees clients in psychotherapy, and speaks internationally. He and his family live in Toronto.