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Much has been made in popular media about the threat posed by cybercrimes and the potential for cyberterrorism. There has been a substantial increase in the body of social science research pertaining to various forms of cybercrime over the last two decades, much of it focusing on digital piracy and harassment. Less research has considered the factors associated with computer hacking, malware creation, and identity crimes, although this is beginning to change. There has also been a substantive expansion in the number of universities offering courses or specializations in cybercrime within social science units. This has caused an increase in the number of cybercrime-related textbooks available on the market, ranging from technically oriented works on digital forensics to more descriptive textbooks on the range of offenses enabled by the Internet. Cybercrime: The Psychology of Online Offenders by Gráinne Kirwan and Andrew Power falls squarely on the side of more general and introductory texts. In defining the scope of cybercrimes, the authors do not use existing or well-established definitions or typologies. Instead, they suggest that cybercrime is a form of crime that can be separated into property crimes, like identity theft, or crimes against persons, such as sexual abuse of children. The