While novels and cinema have repeatedly sought after the historical Jesus, until now none have explored what may be a more tantalizing mystery—the Christian story’s anonymous creator. Logos is a literary bildungsroman about the man who will become the anonymous author of the original Gospel, set amid the kaleidoscopic mingling of ancient cultures. Logos is a gripping tale of adventure, a moving love story, and a novel of ideas. None of this should be regarded as out of place or incompatible in a novel about Christianity’s origin. Dissent, anarchism and revolution—and incipient Christianity was no less these things than the Bolshevik, the French or the American revolutions—inevitably have involved ideas, adventure and romance.