108. BATMAN: The Black Mirror (2010) by Scott Snyder, Jock, and Francesco Francavilla — its easy to see how this propelled Snyder the way it did, but don't overlook the *amazing* artwork from Jock and Francavilla happening here
107. DETECTIVE COMICS #1027 (2020) by various writers and artists — I always like these anniversary short story collections in theory, but none of these stories really stuck in my brain
this aired in 2017 and is really great foreshadowing about the true nature of this character
but also Apartheid McBillionaire is definitely also from the mirror universe