Alastair Reynolds's first novel is "hard" SF on an epic scale, crammed with technological marvels and immensities. Its events take place over a relatively short period, but have roots a billion years old—when the Dawn War ravaged our galaxy.

Sylveste is the only man ever to return alive and sane from a Shroud, an enclave in space protected by awesome gravity-warping defences: "a folding a billion times less severe should have required more energy than was stored in the entire rest-mass of the galaxy." Now an intuition he doesn't understand makes him explore the dead world Resurgam, whose birdlike natives long ago tripped some booby-trap that made their own sun erupt in a deadly flare.

Meanwhile, the vast, decaying lightship Nostalgia for Infinity is coming for Sylveste, whose dead father (in AI simulation) could perhaps help the Captain, frozen near absolute zero yet still suffering monstrous transformation by nanotech plague. Most of Infinity's tiny crew have hidden agendas—Khouri the reluctant contract-assassin believes she must kill Sylveste to save humanity—and there are two bodiless stowaways, one no longer human and one never human. Shocking truths emerge from bluff, betrayal and ingenious lies.

The trail leads to a neutron star where an orbiting alien construct has defences to challenge the Infinity's planet-wrecking superweapons.

At the heart of this artefact, the final revelations detonate—most satisfyingly. Dense with information and incident, this longish novel has no surplus fat and seems almost too short. A sparkling SF debut. —David Langford

In Chasm City, Alastair Reynolds revisits the noir universe of his debut SF blockbuster Revelation Space with a suspenseful, convoluted pursuit story. Its dizzying reversals and games of disguise are reminiscent of Iain M Banks at his trickiest.

The main narrative stars trained killer Tanner Mirabel, a man hell-bent on revenge, who stalks his enemy Reivich from the world Sky's Edge across a 15-year interstellar gap to the gaudy, poisoned melting pot of Chasm City. Flashbacks reveal the violent events and worse repercussions that so badly twisted Mirabel and others. Virus-induced dreams provide a third story line from inside the head of legendary traitor-messiah Sky Haussmann, who long ago shaped the original colonisation of Sky's Edge and whose real story never got into the history books.

Chasm City's complications include spectacular space-elevator sabotage, faulty antimatter drives, hidden aliens, mystery drugs, exotic bio-modification, tailored disease, high-tech weaponry, a new and deadlier form of bungee-jumping, and that traditional SF symptom of decadence: organised hunts with human prey. Violent death is never far off, but our protagonist has deeper worries in that his own motives and memories, even his identity, don't seem to add up quite as they should ...

After many chases, captures and escapes, these tangled plot strands are satisfyingly resolved. Masks are stripped away, and webs of lies exposed. Revelations range from the origin of the dread Melding Plague (which once nightmarishly merged Chasm City's people, machines and buildings) to the reason for an irrational fear of alcoves. An enjoyably tense, tortuous SF thriller. —David Langford