The Heir Of Deception by C.D Halsey

For twenty-two years, Mira Ambros has known one constant‒ the beasts of the night are to be avoided at all costs. But when those beasts suddenly make an appearance during the day‒ taking away the one thing she cares about the most‒ she has no choice. No clear thought other than one. . .
Vengeance.
Mira sets out in search of answers, struggling as she battles looming panic attacks while also taking on the task of protecting the rest of the kingdom. But her focus gets deterred when Nickolai, a fae from her past, makes an appearance once again. Their undeniable chemistry returns in full force, leaving her unaware of whether she wants to sleep with him, kill him, or both– in that order.
With each passing day, the hate that she feels towards Nickolai wavers, while the grief and guilt she keeps buried grows‒ threatening to finish the job and tear her in two. A constant reminder of the little time she has left.

Soon, Mira receives the answers to the questions she has been asking‒ finding out more than she bargained for in the process, about herself. . . and Nickolai.