This book is for librarians, trustees, local government officials, architects, and interior designers who are designing or planning to build, renovate, or reconfigure library spaces. Most librarians embark upon a library building project with little experience in space planning, architecture, or construction. Written by a registered architect and professional librarian, this is a guidebook for librarians embarking on a library building project. It includes a brief history of library facilities, placing them in the context of public buildings. An introduction to library planning principles and a discussion of library design concepts and trends are presented, including the impact of the 2020 pandemic on library design. Sections on working with architects, building design/construction terminology and the basics of reading architectural drawings provide insight into unfamiliar jargon and visual communication. Extensive illustrations and photographs show examples of library layouts and furniture and equipment, and the final chapter addresses the challenges inherent in a major building project. As library services change, buildings must adapt to accommodate and provide these new innovations. Buildings are living things, and this book will offer guidance to those embarking on a project of any scale or size.