Neurobiology of Addiction and Comorbid Disorders, Volume 156, in the International Review of Neurobiology series, highlights new advances in the field of neurobiology, with this new volume presenting interesting chapters on topics such as Pain + Alcohol, Pain + Opioids, Traumatic Stress + Alcohol, Traumatic Stress + Cannabinoids, Traumatic Brain Injury and the Misuse of Alcohol, Opioids, and Cannabis, Depression + Addiction, Microbiome/cytokines + Addiction, Cognitive disorders + Alcohol, Neural stem cells, Neurogenesis and Addiction, Food Addiction,  and Poly-drug Addiction.