The Carryx—part empire, part hive—has waged wars of conquest for centuries, destroying or enslaving species across the galaxy in its conflict with an ancient and deathless enemy. When they descend on the isolated world of Anjiin, the human population is abased, slaughtered, and put in chains. The best and brightest are abducted, taken to the Carryx world-palace to join prisoners from a thousand other species. Dafyd Alkhor, assistant to a prestigious scientist, is captured along with his team.

The metropolis of New Crobuzon sprawls at the center of the world. Humans and mutants and arcane races brood in the gloom beneath its chimneys, where the river is sluggish with unnatural effluent and foundries pound into the night. For a thousand years, the Parliament and its brutal militias have ruled over a vast economy of workers and artists, spies and soldiers, magicians, crooks, and junkies. Now a stranger has arrived, with a pocketful of gold and an impossible demand. And something unthinkable is released.

In the near future, a civil servant is offered the salary of her dreams and is, shortly afterward, told what project she’ll be working on. A recently established government ministry is gathering “expats” from across history to establish whether time travel is feasible—for the body, but also for the fabric of space-time.

From the #1 New York Times bestselling author of Termination Shock and Cryptonomicon, the first installment in a monumental new series—an expansive historical epic of intrigue and international espionage, presaging the dawn of the Atomic Age.

There has always been a darkness to Ilmar, but never more so than now. The city chafes under the heavy hand of the Palleseen occupation, the choke-hold of its criminal underworld, the boot of its factory owners, the weight of its wretched poor and the burden of its ancient curse. What will be the spark that lights the conflagration? Despite the city's refugees, wanderers, murderers, madmen, fanatics and thieves, the catalyst, as always, will be the Anchorwood–that dark grove of trees, that primeval remnant, that portal, when the moon is full, to strange and distant shores.