I read the first book Children of Time, in which spiders inherit the earth, or rather a terraformed planet, late last year. This is the second episode, Children of Ruin, this time with very emotional octopuses (yet with rational tentacles) and with alien self-aware slime mould. We’re going to have an adventure, the mould makes the last remaining humans say.
The weird thing was I kept thinking I read it before, although it was first published last May. Maybe there were a few sample chapters appended to the first part.