- Intrepid Warriors
- Introduction and Succession of Vertebrate Life in America
- Invaders from the North
- Invading Paradise
- Inventing Americans in the Age of Discovery
- Inventing the "American Way"
- Inventing the "Great Awakening"
- Inventing the Job of President
- Inventing the Thrifty Gene
- Investing in Peace
- Invisible Immigrants
- Ishi
- Islam and Democracy
- Islamic Terror Incidents in America Since September 11, 2001: A Chronological Listing
- Island in an Empire
- Island Maid
- Island Sojourn - Those Carefree Years on Barnston Island (1930-1940)
- Islands of Destiny
- Islands of New Brunswick
- It Shouldn't Happen (to a Dog)
- It’s Our Time
- Izola: The Story of John Wilkes Booth's Wife