What would be an interesting topic for a lengthy paper of literary criticism (more details inside)

Hello writerly Jellies!
This semester I’m taking a high-level literary criticism class to complete my English major. Besides several reading assignments, the only other requirement for the class is to choose pretty much any body of fiction (must be at least 10 years old) and write a paper on whatever chosen topic using a critical lens to analyze the body of work, and it has to have a minimum of 30 pages (no max, I think).

I’m interested to hear what you might chose to write about if given this assignment. I’ve had a few ideas, but bouncing other thoughts around could really help me brainstorm.