To find books about geography at WSU Libraries use the Search It catalog with your keywords, authors, titles, or subject headings. Unless you know your title and/or author it might work best to start a search by keyword, for example, 'geography africa' and then use appropriate subject headings appearing in book records that match your criteria.
Here are some Library of Congress subject headings for geography and related topics:
geography biogeography geography [name of region, country, state, etc.] economic geography environmental geography human geography mathematical geography geography study and teaching maps cartography voyages and travels urban geography rural geography geography ancient geographic information systems geography history map projections digital mapping geography philosophy remote sensing discoveries in geography adventure and adventurers ocean travel scientific expeditions