Nathaniel P. Hill Library has 30,000 titles.
You can search the collection (Fiction, Non-fiction, Reference books, and DVDs) in the library catalog.
The collection is arranged on the shelves using the Dewey Decimal System. As a general rule, this keeps books on similar topics close to each other in the stacks.
This YouTube video explains how the Dewey Decimal System works, and is much more entertaining than the average librarian. It's over 4 minues long, but the good parts come towards the end. Watch the whole thing.