The German Congress on Crime Prevention (GCOCP) is an annual event that takes place since 1995 in different German cities and targets all areas of crime prevention. Since its foundation the GCOCP has been open to an international audience with a growing number of non-German speaking participants joining. To give the international guests their own discussion forum, the Annual International Forum (AIF) within the GCOCP was established in 2007. For non-German guests this event offers lectures in English language as well as other activities within the GCOCP that are translated simultaneously. This book reflects the input and output of the 3rd Annual International Forum 2009 which took place 8th and 9th of June 2009 in Hanover (state of Lower Saxony). This book contains lectures of the GCOCP and AIF as well as a contribution from a partner organisation of the congress. The articles reflect worldwide views on crime prevention and criminal policy as well as the current status, discussion, research and projects in crime prevention from different countries, Europe and the world. Also the Hanover Declaration is included, a report about the key findings of the congress.