The City of the Hundred Fiefs

Romantasy novel sets in a secondary world where a city full of towers is divided into a hundred fiefs over which powerful lords and ladies rule.   A young lady has to defend the patch of an enormous metropolis that is under her control while she struggles to improve the life of the inhabitants of her towers. A powerful lord attempting to reunite the whole city under one single rule threatens her independence and her life, especially when he swallows her previous neighbour and she becomes his next target...