The most thoroughly comprehensive book on all types of substance abuse - the history, the bio-neurological, the genetics, the demographics, all different types of drugs and other process addictions (gambling, gaming, sex), treatment. The graphics and graphs/tables are incredibly helpful and easy to understand. New editions (this was published in 2014) come out around every seven years, so I look forward to future editions because there has been so many synthetic drugs and other opiates i.e. fentanyl that were barely touched on since they simply were barely a blip on the radar. So too was legalized pot, and so I can imagine the next wave will become a much larger social and medical issue. The advent of Smartphones was barely mentioned as well, so I imagine that will become a greater topic, too.
This is literally a must-have, albeit expensive, text for anyone wanting to become well versed in addictions.