Find out more about the historical era you're researching so you can interpret your site and location.
You may not find a specific book on your topic or building but you can search for Omaha history books that might have related or contextual information. Look for access to ebooks through Omaha Public Library by searching for the book title in their catalog.
The entire run of Life Magazine is available on Google Books. Access this anywhere.
The Saturday Evening Post is in the Criss Library Academic Search Complete database. Access this on UNO's campus.