International amd multidisciplinary in scope, the unique THE SALIS COLLECTION includes full-text books, reports, documents, and grey literature regarding alcohol, tobacco, psychoactive substances (such as marijuana, opioids, heroin, and cocaine), and other drugs. The books and documents address drug use and misuse, chemical dependency and alcoholism, health complications, treatment and recovery, education and prevention, research and theory, policy and legal issues, societal issues, mental health aspects, process or behavioral addictions, and more.
NCBI (National Center for Biotechnology Information) Bookshelf is a collection of freely accessible, downloadable, on-line versions of selected books covering a wide range of biomedical and public health issues including substance use and mental health disorders. You can read online or download entire books or specific chapters as a PDF file.
The Merck Manuals are a series of free online healthcare books for medical professionals, students, and consumers published by the American pharmaceutical company Merck & Co. (known as MSD outside the United States), The manuals cover a wide range of medical topics, including disorders, tests, diagnoses, and drugs.