Children of Ruin, by Adrian Tchaikovsky

"There's always another way, even for you."

The follow-up to Children of Time, first published in 2019, is another epic, mind-expanding treat. That first book ended with the sentient civilisation of giant spiders and the surviving remnants of humanity forging a last-minute peace after thousands and thousands of years. 

This sequel sees some of their descendants (and one surviving character) voyage to a star system with two roughly Earth-like worlds. Humans already reached this place some millennia before, and the new arrivals are faced with the extraordinary consequence of that early intervention. Whereas, in the first book, one ancient human scientist affected the development of spiders, here another human has a thing for the octopus. By the time the spider-human team turn up, the octopuses have their own spacecraft...

I thought this started a bit slowly, retreading what we'd seen before - and then if completely blindsided me. It really picks up as we come to learn that the octopus people are not the only antagonist in this system. The other, relentlessly predatory species - details of whom I'll not spoil here - is absolutely bloody terrifying and a brilliant threat. We jump back and forth a bit in time to understand how this species developed, which only makes it all the more appalling and implacable. 

We, as readers, come to understand the threat while the spiders and humans are still guessing at what it might be, so they plunge headlong into danger. I don't think I've ever read a book that achieves that thing of horror movies of making you want to shout "No!" about what a character is about to blunder into...

As before, a particular strength of all this is the way Tchaikovsky tells chunks from non-human perspectives, the physiology and biology of the observer defining their worldview. The octopus people are intelligent, curious and mercurial, in part because of the way an octopus's limbs can work independently of its central brain. They act, react and emote in a way that's separate from thinking. That presents challenges in communication: it's less a matter of finding a common language as expressing the right complexity of feels.

From the basis of this biology follows a whole load of logically reasoned but extraordinary stuff. I was wowed by descriptions of the octopus spacecraft that are effectively bubbles of water in space, and the practicalities this involves in such matters as docking and airlocks. There's an amazing, nightmare sequence near the end of the novel that reminded me a bit of Dead of Night, in which one character puts up a series of memory-based defences against an attack, each one at a personal cost. We understand the physics of what's happening in terms of computational power and yet the effect is an effective, unsettling noir.

Mel Hudson is again a brilliant reader for the audiobook version, nimbly personifying a large and diverse cast - humans, spiders, octopuses and the things I won't say more of. We're left at an intriguing point at the end and I'm very much looking forward to the third book, Children of Memory.