Exordia by Seth Dickinson

“Anna, I came to Earth tracking a very old story, a story that goes back to the dawn of time. it’s very unlikely that you’ll die right now. It wouldn’t be narratively complete.”

Anna Sinjari―refugee, survivor of genocide, disaffected office worker―has a close encounter that reveals universe-threatening stakes. While humanity reels from disaster, she must join a small team of civilians, soldiers, and scientists to investigate a mysterious broadcast and unknowable horror. If they can manage to face their own demons, they just might save the world.