You can search the library catalog (OneSearch) to find books. There is a help-guide for this, too!
You may be able to find journals, articles, and videos that the Library has access to using OneSearch; but, certain settings will need to be adjusted on the side-bar to narrow and expand your search. If you reach a dead-end, do not be discouraged. If the library does not have access to something, there may be a way to borrow it from another library.
Want to browse the stacks? For this class, skim through the KF (Law of the United States) and the E and F (History) sections.