The Halo & the Heathen by Dalia Davies

Miracles Require Sacrifice.

I know the rules of the Devil’s dance. I’ve twirled through his ballroom eight times before, but this All Hallows Eve, I can’t be a sinner’s absolution.
There’s only one way to buy a miracle from God, and my sister needs it badly. For her, I’ll risk descending beneath the Devil’s cathedral to find the one thing I could trade for a dying girl’s life.
Getting to the Devil’s halo is easier than it should be. Escaping the demon who guards it once he’s caught me is another thing altogether. Especially when I start to like the sweet agony of defeat.
But the broken halo glows on its plinth as a constant reminder that I can’t stay.
Escape him. Get the halo. Cross the fields of the damned. Slip past the vulture demons… climb to heaven.