The God Engines

The God Engines is a 2009 science fiction/fantasy novella by John Scalzi.

[1] The story takes place in a universe where space travel is accomplished by chaining intelligent, human-like creatures called gods to a spacecraft and torturing them to drive the ship.

The people are ruled by an organization called the Bishopry Militant, who worship a powerful being.

Captain Ean Tephe is completely faithful to the Bishopry, but his faith comes under test when he is assigned a secret mission in which his ship's god seems to have a keen interest.

[3] Publishers Weekly called it "ferociously inventive, painfully vivid, dispassionately bleak and dreadfully memorable", and compared it to a collaboration between J. G. Ballard and H.P.