Son of the Morning by Akwaeke Emezi

Tenderhearted Galilee was raised by the Kincaids, a formidable clan of Black women sequestered deep in the weeping willows and dark rushing creeks of their land. Galilee has always known that she’s different—that there is an old and unknowable secret around her very existence. It has been a hollow ache inside her since her childhood, something she assumes she will always have to live with.

Until she meets Lucifer Helel. He’s fronting as the head of security for her wealthy friend Oriaku’s family, protecting a mysterious, ancient artifact, but from the moment she lays eyes on him, Gali knows he’s not human. From her first incendiary touch, Lucifer knows something even Gali herself doesn’t—that she isn’t human either. 

Leviathan. As Lucifer’s most trusted prince of Hell, Levi is ruthless and determined to eliminate the intolerable danger that is Galilee before she brings death and disaster to those he loves. While unseen battles rage between Hell, Heaven, and earth, Lucifer and Galilee’s attraction threatens to bring all the structures of their existence crashing down around them.

Soon, loyalties will be shattered and reformed as Kincaid secrets clash with the princes of Hell, driving even the most powerful to their knees. Galilee Kincaid must decide if she will step into herself and embrace the consequences of power in this astonishing, seductive, and wildly original fantasy.