Beauty and the Beast: An Adult Fairytale Romance (Once Upon a Spell) by Vivienne Savage

Princess Anastasia Rose dreams of attending school, but her plans are put on hold when war begins between her father and the beastly lord of a nearby castle in the mountains. Prince Alistair isn't an ordinary dragon. He's a shifter afflicted by a curse, unable to become human again until he finds his true love. When a mortal king's adventurers trespass in Alistair's territory to steal a rare flower, the prince decides to steal a valuable prize of his own.