"In the highly anticipated finale to the New York Times bestselling trilogy, dictators, prophets, and tensions rise. In a world that's conquered death, will humanity finally be torn asunder by the immortal beings it created? Citra and Rowan have disappeared. Endura is gone. It seems like nothing stands between Scythe Goddard and absolute dominion over the world scythedom. With the silence of the Thunderhead and the reverberations of the Great Resonance...

"In a world where disease has been eliminated, the only way to die is to be randomly killed ('gleaned') by professional reapers ('scythes'). Two teens must compete with each other to become a scythe--a position neither of them wants. The one who becomes a scythe must kill the one who doesn't"--

Between the time the Thunderhead came to sentience and Scythe Goddard decided something needed to change, there were hundreds of years when humans lived in a world without hunger, disease, or death and Scythes acted as the living instruments of population control.