Really powerful meditation on hate and resentment, and what happens after a conflict has been resolved--for a given value of resolution. Wonderful world-building involving weird-as-fuck eldritch horrors, too. I was almost disappointed at the end that the Little Brothers operated according to human notions of reason. 

You can read my full review on Nerds of a Feather here: http://www.nerds-feather.com/2023/04/review-unraveller-by-frances-hardinge.html