Yes, you most certainly can (and are encouraged to) access books to support your research!
Does it take a little more planning and a bit more work on your part? Yep, it sure does. It will typically take us longer to get a book to you than it will articles, but books provide a different type of resource to support your research and should not be overlooked.
You would be responsible for getting the book back to us, of course. (See the Have Books & Articles Sent to You tab for more info!)