Liar’s Kingdom by Christine Calella

Ell has spent years toiling away for her cruel stepfamily. So when Prince Bayard—who seems to have difficulty recognizing faces—shows up at her door with a glass slipper, Ell allows him to believe she danced with him at the ball. There’s just one problem: Ell didn’t attend the ball and she’s never met the prince before in her life. But if it’s a choice between moving to the royal palace or staying home, Ell is willing to say anything to escape.

 

However, Ell finds that being royalty comes with its own problems. Bayard’s sister, the princess, has gone missing. The king is preparing for war against the fae. And Maxim, Bayard’s treacherous (and handsome) best friend, appears to know Ell is lying.

If Ell wants to keep this life she’s stolen, she’s going to have to roll up her sleeves and rescue herself.