"[Humphreys] has effectively focused the attention of an international audience on responses to a problem of global dimension. The best service this book can render is to open the way for the adoption of the self-help philosophy as an option everywhere and to stimulate an ongoing scientific evaluation of its effectiveness." Isidore Obot & Shekhar Saxena, Bulletin of the World Health Organization
"[An] important and useful book...Read this book." Klaus Mäkelä, Nordisk Alkohol & Narkotikatidskrift
"The author is a well-known figure in the fields of evaluation research and the treatment of substance dependence. He has effectively focused the attention of an international audience on responses to a problem of global dimension." Bulletin of the World Health Organization
"A must read for all addiction professionals as well as all other mental health professionals who encounter substance abuse problems in their clients." Psychological Medicine
"I highly recommend this book." Psychiatric Services