Dallas by Ava Benton

Of all the witches, the one that dragon shifter Dallas likes the least is Hecate.
Hecate can’t stand any of the dragons. Not a single one. She’s used her magic to put up guards against the dragons.
Now Hecate and Dallas have to work together as they travel from Scotland to the United States.
Hecate as part of the contingent to assist with newly found artifacts, and Dallas, as one of the dragons selected to guard the witches.
All plans go to hell in a handbasket during a storm that threatens to kill Hecate’s sister.
Now Hecate has to decide if she hates dragons enough to deny her sister their healing blood.
And Dallas has to get over his dislike for her when he learns she’s his fated mate.