sentences:  "The Skinner" tells the story of three individuals who have journeyed to the 'line-world' (a world on the 'line', or border, of the Human Polity) of Spatterjay, a hostile mostly aquatic world with ferocious native lifeforms.The planet Spatterjay is host to a complex virus that permeates throughout all life forms (including humans), propagated by a kind of leech which uses the virus to keep its prey alive whilst it feeds upon them.The virus optimizes life forms it infects for survival changing them, often rapidly, in response to environmental pressures.