Have you read The Secrets of the Immortal Nicholas Flamel series?

It features Durendal, Joyeuse, Clarent, and Excalibur, as "the four elemental swords".

The series also has a great menagerie of deities and historical figures as main characters. It's really something when you can read a page in which Niccolo Machiavelli and Billy the Kid can be talking to Prometheus and Odin without the blinking an eye.