Course Materials This is a “zero textbook cost” course! That means you won’t have to pay out of pocket for any course materials. All required texts can be found for free on the pages below. Unit 1: Early U.S. Literary Unit 2: Hearing BIPOC Li Unit 3: Immigrant Experiences Unit 4: What is Postmodernism? This entry is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International license.