Sociologists and criminologists have long known that there is a relationship between masculinity and crime. Indeed, gender has been advanced consistently as the strongest predictor of criminal involvement. Flesh and Blood provides a fascinating account of the connection among adolescent gender diversity, the body, and assaultive violence. The book is divided into four parts. In Part I, the author explores the history of criminology as a discipline, paying particular attention to the misgivings about the body, gender, and crime. Messerschmidt shows that criminology historically has maintained, in various ways, the mind-body, sex-gender, and gender difference binaries. In Part II, Messerschmidt presents a theoretical framework_structured action theory_for overcoming these binaries. This perspective allows conceptualization of: embodiment as a lived aspect of gender, both gender differences and gender similarities in the commission of crime, how embodied social action is embedded in specific structural gender relations in particular settings, and how embodied social actions may be related to violence and nonviolence. The methodology for the study is also presented in Part II, which seeks to understand, through life-history interviews, certain boys' and girls' use of assaultive violence as a gendered practice. Part III presents in depth life histories of four white working-class boys and girls involved in assaultive violence. The two chief questions addressed in these life stories are: Why is it that some boys and some girls engage in assaultive violence and how are these violent boys and girls similar and different? How are gender relations in specific settings-such as the family, the school, and the street-related to motivation for embodied violence and nonviolence by the same boys and girls? Part IV puts structured action theory to work by analyzing the three major sites (home, school, and street) of the boys' and girls' life histories and how these are related to assaultive violence and nonviolence. The analysis reveals both similarities and differences between assaultive boys and girls and the fallacy of the mind-body, sex-gender, and gender difference binaries. The book closes with a chapter on how girls' assaultive violence may disrupt gender difference in various ways.