Phoresis and Other Journeys contains three novellas from Hugo Award-winning author Greg Egan.o "The Four Thousand, the Eight Hundred": civil war in an asteroid colony sees refugees fleeing, by any means possible.o "Dispersion": a world where all life is divided into six cyclically invisible and intangible groups faces a terrifying new disease.o "Phoresis": the inhabitants of a double planet embark on an epic, multi-generational project to cross between the twin worlds.