In addition to being useful resources themselves, books (print and electronic) can help you to get overviews on broad topics and to identify citations to related sources (among other things).
In order to find books in either catalog, conduct either a relevant:
Keyword Search, for example:
(See the Search Tips tab for more information on how to construct keyword searches.)
Or Subject Search, e.g.:
(To find more subject headings, look on the catalog records of relevant books or limit your searches to the subject field.)