[Cambridge] For those of you who love The Edge Chronicles

Chris Riddell and Paul Stewart are going to be at the Grafton Centre Heffers on the 27th of April (7:30, IIRC) to talk about their books. It's a ticketed even so you need to go to the Children's Dept of the Grafton Heffers and pick one up. They're free, though.
I would assume they're touring so they might be at a Heffers near you, too.