The University of Michigan Library has an online index and archive of state policies related to book challenges in schools and libraries, beginning September 2023. Resources at this site includes some “lost” or “hidden” documentation behind book challenges and bans in schools and libraries. The collection archives policies from most of the states and has a focus on collecting policies and contextual sources from the state of Michigan. It does include information about ongoing challenges in Florida, Washington, Missouri, and many other states as well.