This is my favorite in the series so far. It has danger, loads of magic, and the vast majority of my favorite characters show up in one way or another.
The addition of Sarah is a great one: it's nice to see a girl finally take up arms in this one.
Gerald Morris has become one of my favorite authors with his series, The Squire's Tales. They are modern-day retellings of the King Arthur stories and fantastic, simple fiction. This is book #6 of 8, I believe.