Book excerpt: As in the second edition of Building Blocks for Planning Functional Library Space, this volume outlines the measures of space needed for the use of equipment and furniture within a library setting. It provides drawings of typical library furniture and equipment along with diagrams of the space required for their use. In addition, this volume also contains a brief text that provides an overview of the planning process, as well as details on several aspects of design and planning. With this expanded and revised edition, planners of new, renovated, or existing space will be better able to effectively utilize the space they have and to resist the temptation to overload a given space with too many functions. This third edition significantly expands the number of illustrations found in the previous edition, adding information on newer library technology and amenities. Photographs of furniture and equipment in library settings further enhance the user's understanding of applicable square footage needs. Designed to be consulted after the decision to build has been made, this volume answers the critical question, "How much space do we need?".