Jon Courtenay Grimwood
And this isn't going to be your traditional signing; danacea of Forbidden Planet describes it as book-buffet-party/wacky miniCon where the tables will be shifted to one side and the authors can mix it up with their fans. So if you're in and about Forbidden Planet, London* on the 22nd, come and check it out and say hello/ask questions/
Visit danacea 's blog for some more details.
ETA: Forbidden Planet Megastore, 179 Shaftesbury Avenue, London, WC2H 8JR