To find books (and more!) use DePauw's Discovery search. It will also search materials owned by libraries all over the world.
Books in our libraries are shelved by the LC (Library of Congress) classification system. In Roy O. West, books with call numbers starting with the letters A-G are located on the Lower Level of the library in our Compact Shelving, call numbers H-K are on the second floor, while books with call numbers starting with the letters L-Z are located on the third floor of the library. Ask at TheDesk for help!