Library books at CSUSB are cataloged with Library of Congress Subject Headings. To explore items catalogued under the subject of design, you may want to use the following subjects in your searches: graphic arts, graphic design (typography), and commercial art.
Though the online catalog is a great tool, sometimes it's helpful to go and browse the resources in the library. If you choose to do this, you might want to start in the following call number ranges: NC845-915 (graphic arts materials), NC950-996 (illustration), NC997-1003 (Commercial and advertising art), NC1800-1896 (various types of print materials), Z242.9-264.5 (practical guides to printing, includes typography).