A murder holds the key to the fate of nearly two million souls . . .

The generation ship New Mayflower nears the end of her voyage and the end of her tether. Disaster looms as surely as the ship's destination.

Isham Ellis's charismatic grandfather gives up flying for farming only to turn up dead. Why murder an old man? A farmworker who taught people about topsoil? Out of revenge? Out of fear?

Or did the murderer have a much larger target in mind?
Can Isham find the answers?

Does he even want to?

A generation ship at the end of her twelve-century voyage. The fate of the ship and the colonists aboard. The debts owed to the cherished dead.

Unto Dirt Return reduces it all to the ability of one man to speak truth to power.