The Mephisto Covenant by Trinity Faegen
Sasha is desperate to find out who murdered her father. When getting the answer means pledging her soul to Eryx, she
unlocks a secret that puts her in grave danger—Sasha is Anabo, a daughter of Eve, and Eryx’s biggest threat.
A son of Hell, immortal, and bound to Earth forever, Jax looks for redemption in the Mephisto Covenant—God’s promise he will find peace in the love of an Anabo. After a thousand years, he’s finally found the girl he’s been searching for: Sasha.
With the threat of Eryx looming, Jax has to keep Sasha safe and win her over. But can he? Will Sasha love him and give up her mortal life?