Malcolm Archibald 
Shadow of the Wolf [EPUB ebook] 

A dark force has awakened in the Highlands.
Scotland, 1388. After Fergus Scott of Eildon travels north to investigate reports of a malevolent presence, he encounters the ferocious Alistair Mor.
Drawn into battle against enchantment and death, Fergus is aided by the lovely but quick-tempered Seonaid. Meanwhile, Donald of the Isles and his army march to confront Alistair, and trouble is brewing as the witches of Scotland gather to recreate the Book of Black Earth.
But when the forces of good and evil collide, can Fergus save his soul and his country?
Inspired by the story of Alexander Stewart – The Wolf of Badenoch.