When Sora's swallowship is taken out by a swarm during the war she is rescued by Merlin, a legendary man who has allegedly discovered a super-weapon built by the Way creators; a gun so powerful it I said to have stopped the previous war. Sora is sceptical, though, for Merlin has been missing for ten thousand years, yet he has not aged a day. As the current war between aliens and humans intensifies, the need to find this weapon becomes unquestionably urgent. They must find the gun before the enemy does and incinerates them. Can their quest to save humanity and end the war be achieved with Merlin's gun?

"The Region Between" first appeared in Galaxy back in 1970. It had originally been commissioned as one of a set of stories by different authors who all used a common starting point as set out in the story's prologue, written by Keith Laumer. Ellison's contribution was a longer work than one usually expects from him, but it nevertheless sustains its bombardment of ideas and feelings throughout. What's more, Ellison created a story that demanded a different format to allow for full expression. The result was a typesetter's nightmare but, as you will see, the experience now only makes this story all the more fascinating, it actually takes you into the story itself. Mike Ashley

'Death in the Promised Land' explores the potential dangers of becoming too closely involved in virtual reality. Parts of the story were later reworked into the novel Tea from an Empty Cup (1988), which had a sequel in Dervish is Digital (2001), both excellent examples of merging cyberpunk with the detective genre.

Craftsman and amateur astronomer Geoffrey Carlisle from Ely discovers that the moon is fractionally ahead of its usual elliptical orbit. He becomes instantaneously well-known for his unique observation. Using Carlisle's findings, astronomy experts discover that each star circling the moon has been slightly warped. Yet after some time, as Professor Wright from Cambridge University had predicted, the warped stars return to their rightful places, suggesting that the world is an information-ordered one, like an analogue program acting out. What then, are the actual repercussions of a computational error in reality?

Far in the distant, post-human future, the Cater-Zimmermann community set out to refute the theory that the universe is created exclusively for mankind by cloning themselves a thousand times over and sending each copy to a different star within the galaxy. One of the copies of Cater-Zimmermann, Paolo Venetti, arrives at Orpheus; a water-world inhabited by floating mats that perform as a Turing machine.

Here are 25 stories of science fiction that push the envelope, by the biggest names in an emerging new crop of high-tech futuristic SF - including Charles Stross, Robert Reed, Alastair Reynolds, Peter Hamilton and Neal Asher. High-tech SF has made a significant comeback in the last decade, as bestselling authors successfully blend the super-science of 'hard science fiction' with real characters in an understandable scenario. It is perhaps a reflection of how technologically controlled our world is that readers increasingly look for science fiction that considers the fates of mankind as a result of increasing scientific domination. This anthology brings together the most extreme examples of the new high-tech, far-future science fiction, pushing the limits way beyond normal boundaries. The stories include: "A Perpetual War Fought Within a Cosmic String", "A Weapon That Could Destroy the Universe", "A Machine That Detects Alternate Worlds and Creates a Choice of Christs", "An Immortal Dead Man Sent To The End of the Universe", "Murder in Virtual Reality", "A Spaceship So Large That There is An Entire Planetary System Within It", and "An Analytical Engine At The End of Time", and "Encountering the Untouchable."

This story is not part of the Revelation Space series. It was developed from notes for an unwritten novel and maybe one day that novel will be completed, for we need to know the fate of the Earth. This story presents one of the more unusual apocalyptic ideas.