Four hundred years from now mankind is strung out across a region of interstellar space inherited from an ancient civilization discovered on Mars. The colonies are linked together by the occasional sublight colony ship voyages and hyperspatial data-casting. Human consciousness is digitally freighted between the stars and downloaded into bodies as a matter of course.For a first-time SF writer to be so surely in command of narrative and technology, so brilliant at world-building, so able to write such readable and enjoyable SF adventure, is simply extraordinary.