William Leisner wrote:
All right, someone has to remind me of Guinan's role in the EW books...
Guinan assisted Gary Seven in preventing a nerve gas attack in the Chunnel. Seven stopped an attack in England, while Guinan prevented a similar attack in France. Her appearance is in Chapter 19, on page 225 of the Hardcover.
Christopher, do you happen to know where in The Buried Age you made the reference to how long it had been since Guinan was on Earth?