SOLVED. Modern Girl travelling in Britain is really Morgan le Fay reincarnated [s]

[Emily]

Trying to find a book (pretty sure it's Young Adult) I read in the late 1990s. It's about a teenage girl named Morgan travelling in Britain, I think with her family. She has always loved Arthurian legend, and read anything and everything that has to do with Camelot. They visit some sort of Druid stone circle (could be Stonehenge, but don't quote me on that!), and she is transported back to the time of Arthur, where she is believed to be Morgaine or Morgan le Fay.

That's pretty much all I remember, except that I think Arthur is a small boy when she goes back in time, and not yet the king. And that they talk about how modern Morgan is really Morgan le Fay reincarnated, or her descendant or something.

Any help would be greatly appreciated! Thanks :)

[Andria]

sounds like The Third Magic

[Emily]

Yup, that's it! Thanks Andria