The World Bank Inspection Panel Casebook serves as an introduction to the Inspection Panels growing body of practice. The first edition of the Casebook contains structured summaries of all registered cases filed at the Inspection Panel by `project affected people and/or their representatives between 1994 and 2011. The case summaries are supplemented by descriptive information and statistics about the Inspection Panel and its cases; and is further enhanced by descriptive statistics concerning World Bank-funded development projects, which form the backdrop of project affected peoples claims as well as of the Panels investigations. The Casebook can therefore be used by a wide audience of practitioners, scholars or students that seek to study the Inspection Panels work as well as comparable `citizen-driven international accountability mechanisms while simultaneously providing a unique window onto the World Banks development operations.