Bringing essential services to the poor,whether in remote rural areas, provincial towns, or in theslums of megacities, is a great challenge for governments indeveloping countries. Lack of governmental capacity andfiscal resources at the national and local levels preventseffective public provision of water, power, education, andhealth services to the poor. And private firms, which oftenstep in to serve the middle and upper classes, are dissuadedby high risks and low affordability from providing theseservices to the poor, or what is sometimes referred to as“the last mile.” In contrast, social enterprises have beenable to provide basic goods and services to the poor. Thisis the gap that the present book aims to fill. It cataloguesover 40 of the most effective market-based solutions forservice delivery to the poor brought about by socialenterprises. It tracks how stylized business models havebeen developed to address development challenges. Thesectors covered are education, energy, health, waste, water,sanitation, and finance. The book’s analysis employs andgreatly benefits from systematically applying a commonframework that helps explain the relevance andimplementation of the model for even general development practitioners.