Book excerpt: The interior design language of the 21st century is the language of retail, and libraries must be fluent to be successful. Most patrons are unaware of the variety of services and offerings that their local library can provide. Rightly or wrongly, library patrons expect robust merchandising, easily accessible spaces and self-directed way finding. Library Space Planning: A PLA Guide is a brief and to-the-point guide that will help you to understand these ideals and recreate them in your library. In addition, you will learn how to improve the functionality of your space in the short, medium and long-term, and discover how libraries can use the ideas herein to aid patrons in discovery, discernment and delivery.