[Mithfânion]

I'm told she weaves Celtic myth into her Fantasy books in a special way. If someone knows more, step forward now! http://www.sffworld.com/ubb/wink.gif

There's the Runeblade trilogy and the Sword in Exile trilogy. Here's a link
http://www.amazon.com/exec/obidos/ASIN/0061056286/qid=1020723188/sr=1-3/ref=sr_1_3/102-6784004-8713714

[Ntschotschi]

Her books have a kind of Scottish or "Highlander" feeling. I don't know much about Celtic Mythology but the series deals a lot with stone circles, elementary Gods and Godesses and Magicked swords.Both series are connected but can be read seperately. The quality of the books varies at places but all in all it's an enjoyable read.