When a structure emerges beneath the Arctic ice, Conner Ash is sent to analyze the anomaly.
What he finds isn't natural.
It isn't human.
And it isn't new.
For billions of years, it has evaluated civilizations-measuring behavior, classifying consciousness, and deciding which species are allowed to exist.
Humanity has less than thirty hours before judgment is complete:
preservation into eternal consciousness... or total erasure.
But something goes wrong.
As billions begin to resist, the system starts to fail.
And Conner discovers a third possibility-one no civilization has ever survived.
To end the system, he'll have to enter it.
To save humanity, he may have to stop being human.
ASH is a literary science fiction novel about consciousness, resistance, and the cost of refusing to be defined.
For readers of Blake Crouch, Ted Chiang, Annihilation, and Never Let Me Go.