This book connects wayfinding and signage with user experience (UX) design principles to assist libraries in creating positive, welcoming signage that communicates effectively and efficiently. Take a more user-centered approach to crafting library signage with this handy guide. Well-designed signage is clear, direct, and reduces confusion and frustration among library users and library workers alike—and also complies with the Americans with Disabilities Act (ADA), bolstering accessibility. Using the principles and examples laid out by Polger, you’ll learn
Good foundational knowledge on user experience & design to benefit library users. Should be read by library administrative bodies as well as library workers/stakeholders involved in signage.
Good foundational intro. This is a very very short book with short chapters, but it is filled with citations. I'm not sure how much "new" I really got from it, however, but there are some handy things I can refer back to later, like font size:viewing distance ratios. If you're familiar with info design or even just graphic design or web design, most of the principles will be old hat. However, this might be a good entree with colleagues who are not familiar with those things and maybe need to be.
There is probably more here about the history of signs and semiotics than one would expect, and there are lots of lists (resolutions for different screen types, font sizes, etc). A good chunk in the middle are case studies, often with before/after pictures from libraries that changed their signs, and some sample signage policies are included, too.
There is a chapter on ADA considerations specifically.