The Equinox Stone by Bryn Donovan

He’s back from the dead,
his memories are gone…
And now, he sees her for the woman she is.

Michael West doesn’t remember anything. Not himself, not his brother, and not being a warrior in a secret society that fights demons and other supernatural beings. He doesn’t trust any of them—except Valentina Vega, a full-figured Mage who’s an empath and a virgin. Her presence and her voice bring him peace.
Val always had a hopeless crush on the funny and charming Michael. He flirted with and bedded others—women, and a few men—but he never saw her as more than a little sister. Now that he’s interested, she tries to resist, knowing that it can be difficult to date an empath like her…and knowing he’d never behave this way if he didn’t have amnesia.
But Michael can be very persuasive. And after their world is rocked by a threat from an ancient enemy, they’re thrown together in a quest to defend Manus Sancti. Val makes decisions she never thought she’d make, putting her life in danger—along with her heart. In love and in war, will the darkness overcome the light?