"Accountability and Security in the Cloud" is a specialized book that addresses the challenges and solutions in the field of cloud computing security and accountability. It is based on the insights from the first A4Cloud Summer School, organized as part of the EU-funded A4Cloud project. In collaboration with other European projects such as CIRRUS, Coco Cloud, CUMULUS, and SPECS, this book provides a comprehensive analysis of current developments in cloud technology. The contributions in this volume illuminate various aspects, including the need for transparency and data protection, legal frameworks, and the development of standards for the cloud. The 13 contributions offer both theoretical and empirical perspectives and serve as a valuable resource for professionals and researchers dealing with the complex issues of cloud security and accountability.