You can find the catalog on the library homepage. You can either search just the library catalog or search the catalog as part of the Library search tool. If you are looking specifically for books or videos, searching just the catalog is often your better bet.
This video provides a quick introduction to searching the catalog.
This video shows you how to request a print book be held for pickup or mailed to you.
Browsing the stacks to look for books is a time-honored tradition for historians. But if you can't physically browse books in the library, you can still use the Virtual Browse feature of the catalog.