Check out these books in print and/or online for further reading on your topic once you've gotten started.
Since day one as Director of Character and Content Development at Marvel Comics, Sana Amanat has pushed to create and promote superheroes who aren't just straight white men. In this inspiring talk, she discusses the encouraging results of that editorial mission -- and stresses the importance of diversity in a medium that serves a decidedly heterogeneous readership.
News and commentary resources are often helpful in identifying ideas, topics, or issues that may be of use to you as you develop your research question. These types of sources are considered "non-peer reviewed' meaning they are not vetted in the same way as articles in academic journals. As with any source, evaluate your information. See the guide homepage for evaluation tips.