The Prison of the Angels by Janine Ashbless

I thought I was a good girl. I thought that no matter what others did for my sake, I could stay innocent. I thought that as long as I acted out of love, I’d be blameless. I was wrong, wasn’t I? Milja Petak’s world has fallen apart. Her lover, the fallen angel Azazel, has cast her aside in rage and disgust. The other contender for her heart, the Catholic priest Egan Kansky, was surrendered back into the hands of the shadowy Vatican organization, Vidimus, after sustaining life-threatening injuries.

She has killed and she has betrayed. She is alone, homeless, and at the end of her tether – torn apart by guilt and the love she has lost. But neither Heaven nor its terrifying representatives on Earth have finished with Milja. Both her lovers need her in order to further their very different plans, and both passionately need her, though they may try to deny it. Milja is once again forced into a series of choices as she uncovers the secrets Heaven has been guarding for centuries. But this time it is not just her heart at stake, or even the fate of a fallen angel.

This time, the choices she make will change everything. This time it’s the End of the World.