The concept of international climate finance channelled from developed to developing countries through public interventions for mitigation and adaptation has been developed over the last decade, but its roots date back to the early 1990s. Despite the high relevance of the topic in the international climate negotiations, illustrated by the (missed) target to mobilise USD 100 billion by 2020, there is no book that provides an overview accessible to academics and practitioners alike. This comprehensive Handbook of International Climate Finance closes this gap, with contributions from expert researchers and practitioners involved in key climate finance institutions. Chapters assess past approaches to international climate finance, discuss the effectiveness of different channels for climate finance, debate challenges encountered and elucidate national strategies of donors and recipients. An important section elaborates perspectives for sources of international climate finance from multilateral channels, the private sector, and blending of finance including through international carbon markets. The Handbook further elaborates perspectives on ownership and accountability and the role of the private sector. Mapping out pathways for the future, it concludes by providing a vision for international climate finance after 2025. This forward-thinking Handbook will be a critical resource for scholars and students with an interest in climate change and related policies and environmental politics, policy, and economics more broadly. It provides key input for international climate negotiators, climate activists and international climate finance institutions.