About the Book
Inhabiting a colony spaceship in the thirty second century are members of a religious cult which left Earth to find a world of their own. Their leader, Seraph, has downloaded his mind into the ship's computers, but now he has gone silent, enticed and serenaded by a siren song coming from inside a black hole. Trapped in orbit around the void, Seraph's followers are confused by his silence, and when the Doctor arrives, he finds a world on the brink of chaos.
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