The second book, Women, Drug Use, and HIV Infection, comprises 13 research papers from a multisite project on HIV infection that was sponsored by the National Institute on Drug Abuse. The editors present an excellent overview of HIV prevalence among women drug users as well as major HIV risk factors for this group. The risk factors are divided into sex-related factors—unprotected sex, multiple sex partners, or sex with high-risk males—and drug-related factors, such as frequency of use and sharing of needles and other equipment. In addition, the authors have expanded the concept of risk to include individual, relational, social, environmental, and cultural factors, thus providing a working model for designing intervention programs for women.