The Faerie King by Deborah J. Martins

With only a season to save her mother’s life, Elysia must outwit Dae—the ruthless Faerie King who would rather shatter the world than let her go.

Fated to die young, Elysia has stolen a forbidden love with Dae, the infamously sadistic ruler of Faerie—and her father’s sworn enemy. Many would fear him, but with death already looming, what did she have to lose?
But falling for a trickster like Dae proves to be a dangerous mistake. Faerie Kings aren’t known for easily releasing their toys. Elysia learns this lesson the hard way when, on her twentieth birthday, the prophesied illness meant to claim her life strikes her mother instead in a cruel twist orchestrated by Dae that culminates in Elysia’s abduction to Faerie.
With only the length of spring to save her mother, Elysia must unravel the secrets of Fearie and enter into a bloody battle with her first love, the ruthless, cunning creature who will do anything to keep her alive and by his side—only one problem, Dae is much more accustomed to bloodshed than she is. And with the doors to Hell just down the corridor, every choice Elysia makes could reshape her fate… or seal her doom.
Torn between a love that defies death and a duty that demands sacrifice, Elysia must decide where her loyalties lie and determine what price she is willing to pay for the people she loves—and whether Dae counts as one of them.

Can Elysia conquer a king, defy fate, and save her mother, or will Dae’s love consume them all?