Yagharek slowly turned the pages. Sepia images of ruin passed before them.

“Ah . . .” Isaac brought his finger down on a drab panorama of what looked like crushed glass and charcoal. The heliotype was taken from very low in the air. A few of the larger shards that littered the enormous, perfectly circular plain were visible, suggesting that the desiccated debris was the remains of once-extraordinary twisted objects.

“Now this is what’s left of the heart of the city. That’s where they dropped the colourbomb in 1545. That’s what they said put an end to the Pirate Wars, but to be honest with you, Yag, they’d been over for a year before that, since New Crobuzon bombarded Suroch with Torque bombs. See, they dropped the colourbombs twelve months later to try to hide what they’d done . . . only one went into the sea and two didn’t work, so with only one left, they only cleared the central square mile or so of Suroch. These bits you can see . . .” He indicated low rubble at the edge of the circular plain. “From thereon out the ruins are still standing. That’s where you can see the Torque.”

He indicated that Yagharek should turn the page. Yagharek did so, and something clucked deep in his throat. Isaac supposed it was the garuda equivalent of a sudden intake of breath. Isaac looked briefly at the picture, then looked up, not too quickly, at Yagharek’s face.

“Those things in the background like melting statues used to be houses,” he said levelly. “The thing you’re looking at, as far as they could work out, is descended from the domestic goat. Apparently they used to keep them as pets in Suroch. This could be second, tenth, twentieth generation post-Torque, obviously. We don’t know how long they live.”

Yagharek stared at the dead thing in the heliotype.

“They had to shoot it, he explains in the text,” Isaac went on. “It killed two of the militia. They had a go at an autopsy, but those horns in its stomach weren’t dead, even though the rest of it was. They fought back, nearly killed the biologist. Do you see the carapace? Weird splicing going on there.” Yagharek nodded slowly.

“Turn the page, Yag. This next one, no one has the slightest idea what it used to be. Might have been spontaneously generated in the Torque explosion. But I think those gears there are descended from train engines.” He tapped the pages gently. “The . . . uh . . . best is yet to come. You haven’t seen the cockroach-tree, or the herds of what may once have been human.”

Yagharek was meticulous. He turned every single page. He saw furtive shots that had been stolen from behind walls, and vertiginous views from the air. A slow kaleidoscope of mutation and violence, petty wars fought between unfathomable monstrosities over no-man’s-lands of shifting slag and nightmare architecture.