Books can provide deeper coverage on a topic. Use WorldCat Discovery to locate books at WVU and beyond.
If you're looking for a very narrow topic and not getting good results (ex: 19th century Mexican watercolor painting) consider searching more broadly (ex: watercolor painting history or Mexican painting history), then look in the tables of contents and indexes of these books for your particular focus.
Use ILLiad to request books from other library systems. There's a link to ILLiad right in the WorldCat record.