Seek out background sources to provide context and clues about where to look for more information.
Keep an eye out for terms/concepts that you can use in your search for books and articles.
When searching, remember that adding terms narrows your search (fewer results). Subtracting terms, broadens your terms (more results)
Open the records for book and article titles to find subject headings (or descriptor terms), summaries (abstracts) and table-of-contents.
Follow the references included in the books and articles you find.
Evaluate what you find. Is it scholarly and authoritative?