I've been in addiction nursing for 4 yrs, and mostly have found out things by looking it up on the internet. But I did get a very good book called "Illegal Drugs" by Paul Gahlinger,M.D.,PhD. Although a lot of patients are addicted to legal opiates and benzos, this is a really good introductory book to the other illegal drugs that you will see patients addicted to. Good Luck. Addiction nursing is never boring! I enjoy it immensely!