The First and Last Demon

Meet Char: a once-renowned human warrior, trapped in an abandoned city with a demon who hates her. A demon who woke her from a fifty-year magical slumber specifically for the sake of tormenting her.
The demon's name: Vesper. She and Char go a long, long way back. They used to be partners on the battlefield. National heroes. An unbeatable team bonded by magic. That bond was supposed to last for the rest of their lives.
Now Char's memory is full of holes. The sealed city is full of hostile magical beasts. And Vesper, with her sharp teeth and unpredictable moods, is the most vicious of them all. As an ageless demon, she's fully prepared to keep holding Char captive forever.
Char struggles to unravel the mystery of why they've ended up pitted against each other, locked in a private war that seems certain to end with one or both of them dead. Does Vesper's senseless cruelty stem from simple demonic bloodlust? From years of suppressed loathing? What else could have driven her past the breaking point-compelled her to suddenly snap and betray her own bondmate?
To uncover the truth, Char will have to face her demon as she would any other deadly monster: as an enemy of humanity, the most formidable and vindictive foe she's ever encountered.
The First and Last Demon is a dark f/f enemies to lovers story with a heavy emphasis on the enmity-but an indelible slow-burning love at its core. Although it's set in the same contemporary fantasy world as the Clem & Wist series, this novel can be fully enjoyed as a standalone tale.