If you want to browse for books on the 4th floor of the library, check out this list of where you can find the subject of your choice.
When you find a book in the catalog that you want to get your hands on, note:
Once you have that information in hand, find the book on the shelf.
If you haven't found a book in an academic library before, take a look at this guide to the Library of Congress Classification System (what we use to organize our books) before venturing upstairs. Be patient with yourself-- it's a little bit tricky to use this system at first if you're not used to it.
Still not finding the book? Ask one of the reference librarians.
You have several choices in finding academic journals:
Individual databases (easier to sort through-- if you have a good sense of your topic, go to one or all of these):