The Sorceress Transcendent by Casey Blair

SFINCS

Once mortal enemies on the battlefield, what can they become supporting each other instead? When Varius, the greatest general of the Aurelian Empire, is forced to flee his homeland, there's only one person he can turn to. A powerful sorceress and once his most deadly enemy, Theira is the only combatant who's ever escaped the war between their peoples. But with the memories of how they kept each other going from opposite sides of a battlefield, when a bleeding Varius knocks on her door, she lets him in, even knowing what will follow. Theira may have gotten away, but as long as the war goes on, she'll never really be free. Now with both their peoples actively hunting them, the two most dangerous fighters in a never-ending war will have to join forces to do the end it once and for all, on their terms. And if they can dare to dream boldly enough, maybe find happiness for themselves, too. The Sorceress Transcendent is a stand-alone enemies-to-lovers epic fantasy romance novella about badasses who enjoy a cozy cup of tea after a long day wreaking epic destruction, because why choose? This story is for everyone who knows what's coming when your former mortal enemy and best rival knocks on the door in the middle of the night and says, "I had nowhere else to go."

Take Back Magic (Diamond Universe: Sierra Walker) by Casey Blair

Earth's magic was stolen. She's taking it back. All Sierra Walker has ever wanted is magic, but the powerful mage who trained her as a child betrayed her, sending her back from a world full of magic to modern-day Seattle. So when he comes to her a decade later, Sierra glimpses an opportunity: She steals his wand, and with it, she begins to steal back magic—for everyone. In magical combat Sierra's a force to be reckoned with, but she's still on her own, her access to magic handicapped, with an entire world of mages now trying their best to kill her rather than share power. So when Nariel, a dangerous demon lord, offers his assistance, she can't say no. But she also knows better than to trust her life, and her magic, to anyone else ever again—no matter how he ignites a part of her she'd thought long lost. But as they race around the world to bring magic back while fighting for their lives, Sierra realizes there may now be two things she can't bear to lose. Diamond Universe: Sierra Walker is a fast-paced, action-packed urban romantasy series spanning the modern world and also other worlds full of magic, with a shadow-wielding demon boyfriend and a heroine who never quits no matter the odds and just goes harder as they fight to change the universe for everyone. Expect the heat level to escalate dramatically in each book.