Highlander's Courage - Joanne Wadsworth - Bog

The legend of the vampire comes alive.
Some call Cairstine one of the dark fae. She holds the ability to morph and can shift into any creature she desires, whether shrinking to the size of a bat, extending to the width of a dragon, or anything in between. She hasn't walked in daylight since her childhood years, has taken her nourishment by feeding from her immortal sisters, but as one of the ancient fae, it's now time for her to come up against her greatest adversary. Her fated mate.
Liam is his clan's doctor, a warrior shifter of immense strength, and when Cairstine arrives from the year 1211 into his twenty-first century time, he's riveted by her. She holds one of the rarest of their people's fae abilities and her immortal soul needs healing. Her desire to embrace the dark is drawing her deeper and deeper into despair and now he is left with no choice. He needs to bring his mate's soul back into the light, or else she'll destroy them both.
Each book in this series is standalone, and can be enjoyed out of sequence.
THE MATHESON BROTHERS SERIES
Highlander's Desire, #1
Highlander's Passion, #2
Highlander's Seduction, #3
Highlander's Kiss, #4
Highlander's Heart, #5
Highlander's Sword, #6
Highlander's Bride, #7
Highlander's Caress, #8
Highlander's Touch, #9
Highlander's Shifter, #10
Highlander's Claim, #11
Highlander's Courage, #12
Highlander's Mermaid, #13