This booklet contains three series of factsheets related to online child sexual exploitation providing easy, ready-to-use resources to anyone interested in getting a better grasp of this issue. The first series is comprised of factsheets describing different manifestations of online child sexual exploitation. The second series covers the five relevant regional and/or international legal frameworks containing provisions regarding one or more of the manifestations of online child sexual exploitation. Finally, the third series consists of Internet and Technology factsheets describing terms and tools which are relevant to understand the Internet and how different technologies are (potentially) used by child sex offenders or those trying to obstruct the perpetrators.