Do you know of any free ebooks about drugs, drug and alcohol treatment, alcoholism,?

I need read a book and do a review for a class about life, society and drugs. I would like an e-book so I can read it anywhere. I could also read one that costs no more than .
Have you read any good books that talk about drugs, or drug use or abuse?

: http://alcoholdrugstreatment.info/do-you-know-of-any-free-ebooks-about-drugs-drug-and-alcohol-treatment-alcoholism