Thief of Spring By Katherine Macdonald

The Greek Gods are real.

But they aren’t gods.

They’re faeries.

When 17-year-old Persephone accidentally stumbles upon a revel, she’s chosen as a sacrifice, but is saved from this fate when the Lord of the Underworld tricks her into becoming his companion for seven months instead. Sephy is taken to his dark palace under the earth, but the Lord of Night isn’t exactly what she expected him to be…

And neither is she.