In the Holman Library catalog, or the KCLC catalog, you can try such keyword searches as:

American drama  AND African American authors

drama AND African-American NOT (storytellling OR criticism OR psycho* OR rhetoric OR authorship)

drama AND Arab-American NOT (storytellling OR criticism OR psycho* OR rhetoric OR authorship)

Suzan-Lori Parks

You may want to limit your search to ebooks.

Please note that many searches will return works of criticism and other undesired results, in addition to the literary works being sought. Culling will likely be required.