Romantasy at its most unrepentant is where Caroline Peckham operates, and Cinder Vale is a fair sample of the mode: a world of zodiac-marked power, enemies who cannot leave one another alone, and a plot that treats restraint as a wasted opportunity.
The book is the third instalment of the Sins of the Zodiac sequence, a darker and more villainous corner of a wider fantasy world rather than a standalone. Readers who like their magic systems ornate and their leads morally compromised are the intended audience, and the writing apologises for neither.
Scale is part of the appeal. This is fiction built for immersion, the sort of series people vanish into for a fortnight and then talk about relentlessly.