There was a book I used to read all the time when I was a kid. I literally paid so much in library fines I should have just kept the stinking book–I probably paid for it two or three times over!
It was set in Scotland, had two brothers, one named Ian. There was a girl who had the second sight, and her name was Kelpie I think. She was in love with the other brother–not Ian–and Ian totally mistrusted her. From my 12-year-old perspective, it was a very intense book.
I’ve googled it and searched at alibris.com and haven’t found anything. So I turned to my fellow dopers, who have yet to let me down!