Her Sexy Beast by Karin Shah

Beast…
Stolen off the street as a teen, tortured for months, altered into a monster, and dumped with only vague memories of his past, Ronan found refuge in the sideshow of a traveling carnival. It’s a lonely life, but it’s all he’s known for years—until he finds himself transforming further day by day, his temper becoming more and more volatile, his body changing into what he can only label as a beast.

Beauty…
Sofia Flores always knew what she would do when she grew up, help run the family-owned carnival. She’s been studying for years, first as a scholarship student at boarding school, then college, and finally getting her MBA. Now, at last, it’s time to take up the reins. But she never bargained with her own fascination for her Tia’s star attraction, Ronan. Not only does he appear not to return her interest, he seems to actively dislike her.
Nothing could be further from the truth, however. Ronan is immediately captivated by the carnival’s curvy new business manager, but he knows the score: beautiful women like Sofia aren’t meant for men like him.

Unfortunately, Ronan has more to worry about than unrequited feelings. Since meeting Sofia, his body reshapes more each day. He’s losing himself to the beast. And the shadowy remnants of the people who did this to him are hot on his trail.
The path to a fairytale ending is never smooth…