The best place to start your research is SLUth Search Plus. SLUth includes articles published in scholarly journals, magazines, and newspapers as well as books, and ebooks. It's very multidisciplinary in scope, so you can use it to find credible sources of information on any topic. It includes about 100 of the SLU Libraries 400 (or so) subscription databases and the SLU Libraries Catalog.
These subject-specific databases are not included in SLUth Search Plus, but may be relevant to your research, depending on what disciplinary perspectives you're looking for.
If you're specifically looking for books in the SLU Libraries, you may find that searching the SLU Libraries Catalog is easier than searching SLUth Search Plus. You may also want to expand your search to include the holdings of MOBIUS libraries or U.S. libraries more broadly (via WorldCat).
Pius Library also maintains a small media collection on the Lower Level of Pius Library. You can search for CDs using the SLU Libraries Catalog.