Reference Books
Reference Books are the best places to find concise summaries and background information on a topic. Reference books cannot be checked out of the library. Some of them are available as databases or ebooks.
Circulating Books
Circulating books (books you can check out) may also provide summaries and background information, but usually go into greater depth about a topic.
Using Books for Research
Using books for research does not always mean that you need to read the entire book.