The papers in this volume highlight the small but growing body of research demonstrating that child sex offending is strongly influenced by opportunities to offend, and that analyzing the environmental contexts of offending may offer new insights into preventing the behavior. The chapter topics include: situational factors in child molesting; the use of opportunity-reduction approaches with intellectually disabled child molesters; legislating and investigating sex crimes against children; social interactions among pedophiles; sexual abuse of children in residential institutions; child sexual abuse and the church: and child sex offending and the Internet; and others.