 Today, there are over 244 million international migrants in the world. For many of them, returning home will be an important part of the journey. While some migrants reintegrate seamlessly into their countries of origin, many face challenges that they cannot overcome on their own. The communities, regions and countries to which they return may not have the infrastructure and resources to facilitate successful reintegration. IOM advocates for the adoption of an integrated approach to reintegration that responds to the economic, social and psychosocial needs of returning migrants, while also benefiting communities of origin and addressing structural challenges to reintegration. With funding from the UK's Department for International Development, IOM has developed a handbook on the reintegration of returnees, unable or unwilling to remain in their host or transit country. IOM's reintegration handbook aims to provide practical guidance for the design, implementation and monitoring of reintegration assistance. It also emphasises the importance of partnership in reintegration programming. Conceived as a hands-on tool, the handbook targets key stakeholders involved in the provision of reintegration related support at different levels and at different stages, including project developers, managers and case managers, but also policy makers and other reintegration practitioners. An integrated approach to reintegration explains the assessments and resource considerations necessary to facilitate the sustainable reintegration of returnees. Reintegration assistance at the individual level guides case managers to engage returnees and their families in the reintegration process, taking into account economic, social and psychosocial factors. Reintegration assistance at the community level provides guidance for involving the community in reintegration activities and gives example of community-level reintegration initiatives at the economic, social and psychosocial dimensions. Reintegration assistance at the structural level focuses on ensuring coordination and coherence among local and international stakeholders such as government and non-governmental organisations and public and private sector in order to provide essential services to returnees in host countries and countries of origin. Monitoring and evaluation of reintegration assistance proposes ways to monitor and evaluate beneficiaries and reintegration programs systematically to strengthen future programming. To maximise its learnings, a customized curriculum based on e-courses and face-to-face trainings accompanies a handbook.