Claimed By the Alien Beast by Nova Celeste

Kavox, a giant, midnight-blue beast of a Chet’i warrior, wants nothing more than to save Earth from the Tanquits. They’re silver-skinned and beautiful, but also treacherous and conniving, and Kavox knows the Tanquits have evil plans for their newest planetary contact.
The Chet’i warriors have tried to warn Earth, but humans are enthralled with the Tanquits. Kavox has been sent to spy on the Tanquits on Earth—but when he sees a human woman, he realizes she’s his fated mate, and he cannot bring himself to leave her behind to be destroyed by the Tanquits.
Lainie Clearwater wants nothing more than to meet one of the aliens on Earth, but knows she’ll never be important enough to be allowed to meet one of the exotic aliens. So when Kavox walks into the comic book store where she works, she’s fascinated by him.
Right up until the moment he abducts her.