An object is approaching Earth. The astronomers call it a captured asteroid. They are wrong.
It has come before - again and again, across nine thousand years - and every time, humanity looks up, smiles, and forgets. Forgetting is the last thing it does to us. By morning the world is content, and no one remembers there was ever anything to survive.
Cass Reeve has spent twenty years making people forget. He is very good at his job. He is also one of the vanishingly few who cannot be made to forget anything at all.
Now the object is close again, and the counter has started. For the first time in the history of the world, one man who remembers means to reach the morning after still knowing what was taken - and to teach ten thousand frightened strangers the one thing no arrival has ever planned for.
To refuse.
The Heronist begins a series about memory, consent, and the only weapon no invasion ever expected: a mind that will not let go.