... written by three authors perfectly placed to comment on this important and growing contribution to the risk management of sex offenders... Overall, this is a valuable book. Although, as stated by the authors, it is not an academic contribution, it will nevertheless be useful for students at both an undergraduate and postgraduate level. It is thus described as a text for those who either know very little about sex offenders or who want to find out more, or who particularly want to know more about Circles. Notwithstanding this, as stated above, Chapter 5 and the empiricalresearch contained within it should be of interest to all academics and practitioners involved in the treatment and management of community-based sex offenders, and for this reason the book is highly recommended.