With NO spoilers, a series where every lingering mystery and plot point is eventually simultaneously tied together into a huge reveal?

I’m looking for a series where every confusing element, unanswered question and random plot point is eventually tied together into some massive mind bending reveal. Less “Chekov’s gun” and more “Emptying chekov’s entire magazine in one go”.

In terms of books the prime example I can think of is Mistborn.

Examples from other media would be The Good Place and The Magnus Archives. Obviously not requesting shows or Podcasts, just books with reveals similar to these.