- Panoramic Maps
- Photographs from the Chicago Daily News
- Pioneering the Upper Midwest: Books from Michigan, Minnesota, and Wisconsin, ca. 1820-1910
- Poet at Work: Recovered Notebooks from the Thomas Biggs Harned Walt Whitman Collection
- Prairie Settlement: Nebraska Photographs and Family Letters, 1862-1912
- Prosperity and Thrift: The Coolidge Era and the Consumer Economy, 1921-1929
- Puerto Rico at the Dawn of the Modern Age: Nineteenth- and Early-Twentieth-Century Perspectives