If you're off campus, make sure you select "electronic" on the Advanced Search page before you search for items. This will tell the catalog to only show you e-resources than can be accessed online. Or, if you're in Illinois, but not on campus, you can request print materials to come to a library near you (see I-share box below).
If Milner doesn't have the book you're looking for, you can always request a book through I-share. Not on campus? Not a problem! When you request an i-share book (including books from Milner), you can select any I-share affiliated library location to pick it up/return it. So, even if you're back at home you can still use library resources!