Book excerpt: This book explores all aspects of the sharing economy, pursuing a multidisciplinary approach encompassing Service Design, Spatial Design, Sociology, Economics, Law, and Transport and Operations Research. The book develops a unified vision of sharing services, and pinpoints the most important new challenges. The first, more theoretical part covers general topics from the perspectives of experts in the respective disciplines. Among the subjects addressed are the role of the user in co-design and co-production; impacts of sharing services on cities, communities, and private spaces; individual rewarding and social outcomes; regulatory issues; and the scope for improving the efficiency of design, management, and analysis of sharing services. In turn, the second part of the book presents a selection of case studies of specific sharing services, in which many of the concepts described in the first part are put into practice. Readers will gain a deeper understanding of the dynamics of sharing services and of the hidden problems that may arise. Key factors responsible for the success (or failure) of sharing services are identified by analyzing some of the best (and worst) practices. Given its breadth of coverage, the book offers a valuable guide for researchers and for all stakeholders in the sharing economy, including startup founders and local administrators.