Charmed By the Fire Dragon by Juniper Kerry

Evie:
There’s an assassin after me, and that’s the least of my problems. The main one, the big, stinking, giant problem I’m facing is the super gorgeous alien with the growly voice who keeps grabbing me and kissing me.
Whess is a hunk, there’s no getting past it, but he’s also slept with every woman this side of F’Reit Prime, and the last thing I need is to fall for someone like that. I have to keep my wits about me, especially since we’re trying to solve the mystery of a poisoned forest. You would think it would be easy to keep my hands to myself, but Whess… he brings out the worst of my bad decision-making powers.

Whess:
I love women, but I always keep them at a distance. My true nature, my ability to shift, is not something I am willing to share with anyone, aside from my brothers. Dragons are nothing if not solitary… at least, we were, before my brothers fell in love and started breeding.
Despite the secrets I keep, I have never lacked for partners to warm my bed. But lately, I find that the women I used to enjoy are not enough. Instead, I find myself daydreaming about a spritely, clumsy little creature—a human female named Evie.
She is supposed to be here to help me solve the mystery of the forest, but I confess, I find myself endlessly distracted by her presence. I have a mission to fulfill, and she is getting in the way. So why can I not stop myself from dragging her into the darkest corners of the castle and kissing her breathless?