Thunder on the Right (by Mary Stewart)

I first read some of Mary Stewart’s novels when I was a teenager. I probably borrowed them from my school library. I remember finding them quite tense, and scary in places; but I also loved the underlying romantic threads that run through most of them. ‘Thunder on the Right’ was a title I recalled - although not the story line - when I acquired a copy of the book second-hand about fifteen years ago.

I last read ‘Thunder on the Right’ in 2005, and had entirely forgotten the story. I like it whe...