This 2020 book by Rebecca M. Marrall (Western Washington University) provides library professionals with the knowledge, tools and templates, and practical examples necessary for developing a tailored and comprehensive accessibility plan for their institution.
Details about the book can be found on the publisher website: https://rowman.com/ISBN/9781538131138/Developing-a-Library-Accessibility-Plan-A-Practical-Guide-for-Librarians
To find a copy of the book in a library, visit WorldCat: https://search.worldcat.org/title/1141032977