Search in the library catalog for the title or author of the book. If it's available, you can either come to the library and check it out, or request it. If you are an online student or a U.S. student outside the St. Louis area, please refer here for requesting a book. If you are an international student, please refer here. 

There are tips within our library catalog about searching: Searching MOBIUS.

If you can't find what you're looking for or are having trouble with requesting something contact a librarian.