Search Discover Local (the catalog) to find books housed in Bizzell Memorial Library, the branch libraries, the special collections, the law library, and in storage, including the government documents collection. (Discover Local also lists all the journals, magazines, newspapers, microfilm, etc. at these locations.)
See this page for detailed help on Discover Local.
Useful subject terms for finding books on public policy include:
Use these search terms in Discover Local in combination with your topic (e.g., immigration and social policy).
Most books on public policy are in the J call number range (Bizzell Memorial Library 3rd floor, west side). For more detail, see https://www.loc.gov/aba/cataloging/classification/lcco/lcco_j.pdf.