Justina Robson's sf/fantasy novels stand in an exceptional category entirely on their own, unique. No one has a voice like hers.
In this collection we get that voice in little microcosms - some of which refer back to her novels like the amazing LIVING NEXT DOOR TO THE GOD OF LOVE, and also (in the excellent pure fantasy story 'An Unremarkable Man')the Quantum Gravity series, but always in her imimitable voice. My own favourite is THE GIRL HERO's MIRROR SAYS HE'S NOT THE ONE, which does a typical Robson thing: it takes a universal sf/fantasy dream--come-true convention(to be a superhero) and looks at it from the inside, from the real life lived instead of the concept - where of course it's the normal, maybe even the boring life, in fact all the other considered possible lives the superhero could be living out there that look so very vivid, and the girl hero is not satisfied. In fact, that reaching out for the perfect life, trying to figure it out, needing to mix reality and imagination to have any chance of being fulfilled, is a wonderful thread running through this collection. As Robson herself puts it in her (all too brief) notes appended to the final story 'Regardless of prgoress in technology human beings have yet to deal with the real problems that have always driven them - the tensions created by their existence as individuals and animals of limited powers but powerful imaginations, for whom biology is still destiny and that destiny is death.' In this collection, Robson looks at this and much else with power and a lot of humour too.
Adam Roberts introuction is also very good, a serious, indeed almost academic assessment of her work, which is the very least this remarkable writer deserves.