I teach both The Outsider (some may know it as The Stranger) by Albert Camus, and There There by Tommy Orange, to my senior (in Canada, Grade 12) English classes.

It was only after two years of teaching both that I picked up on a line in the first chapter in There There narrated by Edwin Black, an obese young man who has been constipated for several days. At one point, he comments, "You could either shit or not shit."

I immediately grabbed a copy of The Outsider and turned to a few pages before the end of Chapter 6 in Part I, in which Meursault muses (with a gun in his pocket), "I realized at that point that you could either shoot or not shoot."

The fact that Tommy Orange is very well-read, and his character, Edwin, has a M.A. in Comparative Literature, leads me to think it is not a coincidence.