The Nameless Trickster by Rebecca F. Kenney

When Juliette’s older brother makes an astounding claim to save his own skin, Juliette is escorted to the palace, along with other magically gifted young women who are being taken from their villages so the king can choose a bride.
But Juliette’s brother lied. She has no magic. She’s a baker and a businesswoman, not a sorceress… and now she’s trapped, facing death if she displeases the king.
When a handsome tattooed man shows up and proposes a bargain, Juliette makes a deal with him out of desperation. But their collaboration results in a crisis neither of them expected, one with dire consequences—
Unless Juliette can learn the stranger’s true name.