Long Mars

The third novel in Terry Pratchett and Stephen Baxters Long Earth series, which Io9 calls a brilliant science fiction collaboration.2040-2045: In the years after the cataclysmic Yellowstone eruption there is massive economic dislocation as populations flee Datum Earth to myriad Long Earth worlds. Sally, Joshua, and Lobsang are all involved in this perilous rescue work when, out of the blue, Sally ...