The Phantom of Faerie Mountain - a YA fantasy adventure by E M McIntyre

http://www.amazon.com/Phantom-Faerie-Mountain-King-Triology-ebook/dp/B00WPZZ8F0

A telepathic dog. An ancient prophecy. Two devious faeries. 14 yr old Abby Fletcher must unravel their connection when she is thrown into a world of unknowns after receiving a mysterious message from a frightening beast: The Red King must set me free. Determined to discover the meaning of this puzzling phrase, Abby sets off to explore a nearby Scottish mountainside in search of clues. What Abby doesn't realize, however, is that it's not a matter of where she will find her answers, but when. Whisked back to the early 14th century, Abby must find the courage to solve the mystery of the Red King and save not only herself but a group of powerless captives wrapped up in a faerie plot.