A Veil of Moonlight and Madness by Analeigh Ford

There is no worse betrayal than being kidnapped by the fae.
Or so Delphine thought.
She’s been torn from her home, forced to face the curse that plagued her since birth, and nearly murderedmore times now than she can count—and yet that never broke her.
No, not even the princes, not even the kings of faerie, managed to do that.
But this, this most recent betrayal, just might.
And that will be their downfall.
The fae should have broken her before they made her stronger.
With little magic to aid her, Delph must find her way back to the human realm to reach her brother before the fae prince Nyx. She made the foolish mistake of trusting him, even for a moment, only for him to prove himself to be the beast she once believed all fae to be.
He’s dangerous, determined, willing to offer up anything in exchange for the magic that will save his dying kingdom. There’s one problem with that, however.
So is Delphine…and it’s not just a throne or even her brother she’s trying to save, it’s the whole human race.
The tides are turning between the realms. Loyalties are shifting. Fates aligning. Something changed the night the Starlight Fae witnessed one of their own die.
Nothing is certain except for this—Delphine is finally going back. She’s finally going home.
Only, she isn’t going back alone.
This time, she’ll have the royalty of not one, but two fae realms at her side.
For better or worse, the fate of all realms is about to be decided.