Crown of Briars by R.L. Perez

He must wed her to break the curse.
She must kill him to save her kingdom.

Every generation, the Earthen Court gives a princess bride to the Wraith King to protect their realm from his deadly shadows. Princess Sybelle has prepared her entire life to be married to the monster who has been terrorizing her people.
And she has a plan to end her people’s suffering for good.
With the help of her dragon familiar, who can sniff out powerful enchantments, she intends to uncover the source of the Wraith King’s shadow magic. Once he is rendered powerless, she plans to kill him.
But despite his demonic appearance, the Wraith King is not who he appears to be. He is as alluring as he is deadly and, as Sybelle comes to know him, he awakens a fire in her soul she never knew she had.
When she realizes he is trapped by a powerful curse, she wants to do everything in her power to break it.
But to do so would endanger her own life and the lives of her people.
Torn between her duty to her kingdom and breaking the Wraith King’s curse, Sybelle must decide where her loyalties lie: to the home she was raised to protect, or to the dark king who has worked his way into her heart?