Hannah Kaner: Godkiller

Enter a land of gods and monsters, soldiers and mercenaries, secrets and wishes—the explosive #1 internationally bestselling fantasy debut in a new trilogy for fans of The Witcher and Gideon the Ninth
Gods are forbidden in the kingdom of Middren. Formed by human desires and fed by their worship, there are countless gods in the world—but after a great war, the new king outlawed them and now pays “godkillers” to destroy any who try to rise from the shadows.
As a child, Kissen saw her family murdered by a fire god. Now, she makes a living killing them and enjoys it. But all this changes when Kissen is tasked with helping a young noble girl with a god problem. The child’s soul is bonded to a tiny god of white lies, and Kissen can’t kill it without ending the girl’s life too.
Joined by a disillusioned knight on a secret quest, the unlikely group must travel to the ruined city of Blenraden, where the last of the wild gods reside, to each beg a favor. Pursued by assassins and demons, and in the midst of burgeoning civil war, they will all face a reckoning. Something is rotting at the heart of their world, and they are the only ones who can stop it.