Book excerpt: Discovery is central to academic activities at all levels and is a major focus for libraries and museums. Of all the parts of modern library provision, discovery services are the most clearly affected by developments in IT, from databases to search engines to linked data to machine learning. It is crucial to the relationship between libraries and their communities. This book will help its readers learn how to adapt in a fast changing area to continue to provide a high level of service. Resource Discovery for the Twenty-First Century Library contains a range of contributions analysing the ways in which libraries are tackling the challenges facing them in discovery in the (post)-Google era. Chapters are written by experts, both global and local – describing specific areas of discovery and local implementations and ideas. The book will help with enhancing discovery both inbound – making locally held resources globally discoverable, and outbound – making global resources locally discoverable, in ways which are relevant to your user community. Content covered includes: · a survey of what resource discovery is today · case studies from around the world of interesting approaches to discovery · analysis of how users approach discovery · how to understand and make the best use of Internet search engines · using limited resources to help users find collections · linked open data and discovery · the future of discovery. This book will be useful for subject librarians and others who give direct support to library users, digital library technicians, managers, staff with responsibility for managing electronic resources, metadata and discovery specialists, trainers and user education specialists. It will also be of use to curators and others who give direct support to researchers, managers of digitisation and cataloguing products, IT staff, trainers and user education specialists.