To find just "books" and eliminate other types of resources - - once the Quick Search results display, use Tweak My Results on the right side of the screen to limit to Books.
In addition to physical books the Library also purchases e-books. In the results for your book search, select "Available online" to see only e-books. In a full list of books, the ones that are available electronically will say "Online Access" in the record. When you click the link you'll be directed to the e-book.