LeVay is a British-born neuroscientist turned science writer and teacher, who has taught at Harvard U., the Salk Institute for Biological Sciences, the U. of California, and Stanford U.; Baldwin teaches sociology at the UC-Santa Barbara. As with past editions, the third edition of their textbook on human sexuality maintains and extends the authors' dedication to the evidence-based approach to examining and understanding the topic. In addition to bringing on board Baldwin as a new coauthor, the third edition features some reorganization of the material, incorporation of new findings from recent studies, updated statistics, information on new and emerging technologies and drugs, documentation of legal and political events related to sexuality and sexual behavior, changing social trends, and references to important texts published since the second edition. The text is accompanied by a companion website. Annotation ©2009 Book News, Inc., Portland, OR (booknews.com) Read Less