A Realm of Fire and Ash by Kathy Haan

Morte, a fierce fae of the Phoenix order and a respected commander of the Royal Guard, meets an untimely demise during a special ops mission to Bedlam Penitentiary. Her task is to eliminate a dangerous prisoner, but in doing so, she is reunited with her best friend, whom she has secretly loved for her entire life. Tragically, her joy is short-lived as she dies and wakes up in the underworld, where she faces an unexpected and deadly enemy, Aggonid — the ruler of the underworld, who sees her as a threat to his throne.
Determined to return to the realm of the living and to her beloved, Morte must convince Aggonid of her innocence and earn back his trust, all while avoiding his constant attempts on her life. As she fights to reclaim her freedom, Morte’s very soul is at stake, not only facing the eternal torment of her new reality, but also navigating the complexity of multiple suitors vying for her heart.
Will Morte find a way back to the realm and the one she loves, or will she be forced to choose between them? A Realm of Fire and Ash is a tale of one fae’s journey for survival, redemption, and the true meaning of love in the afterlife, where fate seems to have something more sinister in store for her.