True Names: And the Opening of the Cyberspace Frontier, Vinge, Vernor
Vinge is a mathematician turned computer scientist. True Names is one of those stories that gains additional relevance for me because of its influence over many of those who went on to develop the technology for real that Vinge dreamt up in his fiction. This particular volume makes the story readily available again and surrounds it with a collection of interesting essays on the influence this story had during the formative days of the net. The story stands well on its own, but the essays are also worth your time.