The Darkest Shadow by Jessica Powell

Cora has never quite fit in‒not at school, not at home, not even in her own skin. Plagued by terrifying dreams of winged beings and a war she doesn’t understand, she tries to ignore the darkness creeping into her life. But when a mysterious new student arrives—dark, dangerous, and impossibly magnetic—everything changes.
Slade was sent to kill her. A fallen angel bound by duty and haunted by his past. But the moment he lays eyes on Cora, the lines between mission and desire begin to blur. She’s not just another target—she’s the key to something far greater. Something the angels and demons would kill to control.
As secrets unravel and a hidden world begins to bleed into her own, Cora is forced to question everything—her past, her bloodline, even her humanity. With Slade by her side and enemies closing in, she must choose between the life she’s always known and the war she was born to fight.