Britta Kyvsgaard examines the nature and aspects of the "criminal career" through her longitudinal analysis of 45,000 Danish offenders. The data, unparalleled in size and quality, allows powerful analyses of criminal behavior, even among relatively small demographic subgroups. Kyvsgaard is thus able to make solid assessments of offending patterns for males and females, juveniles and middle-aged adults, and employed and unemployed individuals. Furthermore, she examines the empirical evidence of the effects of deterrence and incapacitation. Her findings suggest rehabilitation as an alternative worthy of further research.