The Classic Catalog includes records for books, journals, newspapers, conference proceedings, government documents, microforms, DVDs, and audio recordings that are held in the WU Libraries. The Classic Catalog does NOT include journal articles; use article databases for articles. Also, see "Using the Classic Catalog" for more info.
As you'll be focusing at least in part on one of the four texts, you may want to look for books and other items critically covering these texts. You can conduct a keyword search (e.g. "Morrison" "Beloved"). But you can also search the author and titles as subjects. See below:
You may find other relevant items by scrolling throught the subject list. "Criticism and interpretion" after an author's name refers to general criticism.