You can search for books using the more modern Quick Search, or try our legacy interface Classic Catalog which some users prefer for book searching. In Quick Search,if you are searching exclusively for books type in your search terms and limit your search using the filters on the left-hand side by scrolling down to "Resource Type" and selecting the checkbox for "Books." 

Like most of our catalogs and databases, make sure to leave out any umlauts (so "über" becomes "uber") and replace Eszetts with "ss" (so "Spaß" becomes "spass").