Chase by Kathi S. Barton

Chase Crosby didn’t know what he wanted right now. He was trying to get a grip on who his new mate was. He was told she was an ice dragon, but that wasn’t right either, she was a protector of the ice dragons. He had so many questions, and all he could do was sit there while she was locked away in his freezer to recover from her injuries.
Emerald was a warrior, and she had no idea what she was going to do with a mate. Even though the vampire appealed to her, she was worried the people chasing her would hurt him or his family to get to her, and she couldn’t allow that.

A Homeland Security Agent had gone rogue and he was after Emerald. He didn’t know exactly who or what she was, but he was going to prove she’d been around for centuries, and it didn’t matter who he had to go through to get to her.