Book excerpt: Opportunity theories of crime seek to explain the occurrence of crime rather than simply the existence of criminal dispositions. They emphasize the fundamental element in the criminal act of opportunity: how this arises, how it is perceived, evaluated and acted on by those with criminal dispositions. This volume brings together influential research articles on opportunity theories of crime by leading theorists such as Cohen and Felson on routine activity theory and Clarke and Cornish on the bounded rational choice perspective. The articles also include more recent theoretical developments and studies of situational crime prevention of specific twenty-first century crimes. These articles attest to the sheer volume as well to as the richness and the variety of work designed to reduce crime that has forever changed the face of criminology and criminal justice.