Highland Steel (Guardians of the Stone Book 2) by Tanya Anne Crosby

"A tale so engrossing the reader will immediately search out the rest of her books just to make the enjoyment last a bit longer!" —inD'Tale Reviews 
  

Defying her laird and brother, Lael of the dun Scoti clan takes up her sword to fight beside the MacKinnons in order to return Keppenach to its rightful heir—to Broc Ceannfhionn. She'll risk everything to keep the stronghold out of the hands of King Henry's Butcher... even her life. 

They call him The Butcher, but not even Henry's henchman would hang a woman. Riding into the gates on winged fury, Jaime Steorling cuts the raven-haired beauty down from the gallows only to discover himself a willing prisoner of Lael’s heart. In the end, only a bond of love between bitter enemies can bring healing to broken nations. 

Embark on a journey into magical Medieval Scotland, to a time when the shadowy Picts are in peril of vanishing from the annals of history, and Scotland itself will arise as a nation from the ashes of betrayal.

Read this series in order:

1. Book1: Once Upon a Highland Legend
2. Book 2: Highland Fire
3. Book 3: Highland Steel
4. Book 4: Highland Storm
5. Book 5: Maiden from the Mist