Check the catalog - while we don't always have the textbooks assigned for classes, we sometimes will. If you see it in the catalog be sure to check and make sure the date and edition match what your professor is requiring. An easy way to search is on the library home page - (all the lab PCs start on the LITS page - from there click on the line for Drake Library.) Then under the books tab you will see a check box for exact title. Click on that then put in your textbook's title in the search form.
Sorry, but if we do not own a textbook we will not get it through interlibrary loan, it would just overload the system. Try the bookstore, or online sites like Amazon.com or Betterworldbooks.com.
As always, we are always glad to help you - see our "ask a librarian" page.