My Contrary Mary by Cynthia Hand, Brodi Ashton, and Jodi Meadows 

Mary is the queen of Scotland and the jewel of the French court. Except when she’s a mouse. Yes, reader, Mary is an Eðian (shapeshifter) in a kingdom where Verities rule. It’s a secret that could cost her a head—or a tail.⠀

Luckily, Mary has a confidant in her betrothed, Francis. But after the king meets a suspicious end, things at the gilded court take a treacherous turn. Thrust onto the throne, Mary and Francis are forced to navigate a vip… Read more.