This textbook is very thorough in its coverage of each drug and the relations of drugs to society and human behavior. I love how the chapters were organized to cover each drug. Section 1 gave a broad overview of drugs us in modern society. Section 2 covered how drugs work and their effect on the nervous system in the human body. Section 3 covered all the "uppers and downer" drugs which includes: stimulants, depressants, inhalants, and medication for mental disorders. Section 4 focused on alcohol, and Section 5 focused on the common legalized drugs such as caffeine, tobacco, dietary supplements, and over the counter drugs. Section 6 covered restricted drugs which includes opioids, hallucinogens, marijuana, and performance-enhancing drugs such as steroids. Section 7 covered preventative methods and treatment for those with drug and substance abuse. Overall, if you are interested in learning about marijuana, cocaine, heroin, morphine, caffeine, alcohol, opioids, hallucinogens, and prescription drugs; this book is a great read.