The Sunbound Princess by Amy Pennza

Summon the sun. As heir to the Summer Court, I was born to wield sunlight like a weapon. But when my father dies, the sunstone—the source of my kingdom’s power—vanishes. To claim my throne, I must retrieve it and prove my worth.
Alone and desperate to save my crown, I enter the human realm…and end up rescuing two charming, infuriating thieves from the hangman’s noose.
Nikolas is a silver-tongued scoundrel with a crooked grin and a past he won’t talk about. Dain is his brooding, silent shadow with magic in his veins and wicked skill in his hands. They claim they can help me, but I’m not sure what they want in return.
Wanting them is reckless. Sleeping with them is a mistake I only intend to make once. But when we touch, my power stirs. And when we burn together, the sunstone beckons.
Now I’m deep in the human realm, my days spent hunting the stone and my nights tangled between two men I can’t afford to fall for. Because the only thing more dangerous than loving them…is trusting them. And when you play with fire long enough, something always turns to ash.