It's one of those Adrian Tchaikovsky novels that has alternatively-evolved sapient animals in it, but it also has an unexpected amount of queer characters. Tchaikovsky tends to be good at the former, and this book is not an exception; he also handles the latter well enough, though if you are not okay with bigotry exhibited by some of the more contemptible characters being part of the plot, you may want to skip this one.
The novel starts out kind of slow and takes a while to ramp up while you want to scream at the characters to figure it out already. In the middle, it may seem to be a bit predictable, although it does take some interesting twists in the last third, which subverts that impression a bit.
Overall, a fun parallel universe story, if you're into that sort of thing, even if not an exceptional one.