Heavenly Bodies (Heavenly Bodies #1) by Imani Erriu

"I defy the stars."

In a world where no entities exist but the Stars, cruel and merciless gods that watch over the world, Elara has been cursed by fate. A prophecy that promises she will fall for a Star, and it will kill them both.
But when one descends to wreak havoc on Elara's Kingdom, she is forced to flee into the arms of her enemy in the neighbouring country.
As she learns more about her own magic, and the depth of the Stars' deceit, she also finds herself learning more about the country she is forced to take refuge in, and the enemy prince forced to train her into a weapon.
Something dark brews within her, a power made of night and shadows that begs to be broken free.