The Fallen by C.N. Crawford

In Dovren, even the angels sin.

Most nights, I dance and laugh with friends till the morning birds start to sing. But then disaster strikes.
A sinfully sexy angel strides in to my favorite dance hall and compels me to work for him–in Hades Castle. Sure, I always wanted to see the inside of the ancient fortress that looms over the city. But the fallen angel is a brutal tyrant–and I think he killed my sister.
Now, he wants me to pretend to be his wife. Instead, I plan to assassinate him. Too bad the only way to kill an angel is to seduce him. And the sensual charms of the fallen will make it hard to stay on task.
But this is a battle, and he’s my beautiful enemy. We are fighting with weapons of desire, and we’re both at risk of losing ourselves in this war.