The explosive conclusion to the New York Times bestselling Arc of a Scythe series.

It's been three years since Rowan and Citra disappeared; since Scythe Goddard came into power; since the Thunderhead closed itself off to everyone but Grayson Tolliver.

In this pulse-pounding finale to Neal Shusterman's internationally bestselling trilogy, constitutions are tested and old friends are brought back from the dead.