I work in a prison based sex offender treatment program. I provide court mandated individual and group treatment to offenders in the last 18 months of their sentences. Until recently the majority of my clients have offended against children; however, I was recently assigned 2 rapists whose victims were adults. My supervisor recommended Men Who Rape as a jump-start text for addressing these clients' needs.
The text is very useful in that is provides general classifications for the major types of rapists. It addresses the motivations inherent in each type. It explains the concept that rape is far less about sex than it is about anger, power or control. It uses clinical interviews with both perpetrators and victims to illustrate concepts.
It is a useful basic text. Published in 1979 there is some dating apparent in the language used, most especially in the interviews. But it is worth the money, for the paperback edition anyway.