I absolutely LOVED that trilogy! It was one of my favorites. I also liked Jewels of the Sun where the woman goes to Ireland and the fairies intervene? Did you read that one?
I am writing a novel right now about Elementals. They are rare and my new book is not about them in a true sense but ties it in with mythology. The book is Titled Jewels of Hera. Be on the look out for it next year.