This landmark text represents the first attempt to discuss the sustainable development of digital information in three key aspects: economic, social and environmental sustainability. Taking as its starting point the premise that digital information systems and services form the backbone of a knowledge society and digital economy, this book explores the challenges of ensuring sustainability of information in an evolving digital world. Chowdhury addresses the key factors and policies influencing digital information sustainability and presents a new balanced model of sustainability for digital information systems and services. Illustrated with case studies and informed by the latest research and policies, this cutting-edge text is a must-read for anyone concerned with the future of the information profession. Readership: Those involved in setting policy and direction for information institutions, digital library managers and developers, researchers and students on LIS and digital information courses.