Significant Digits is the utterly brilliant sequel to hpmor, covering what happens in the world of magic after Voldemort is defeated. Mind-bending in scope, the plotlines are thick and complex and satisfying, and there’s genuine horror. The last bit becomes a bit of a gorefest, and the ending is…slightly underwhelming, but what a journey.
The scene where Hermione creates her Patronus is one of the most powerful I’ve ever read.