this is a very moving, intriguing novel and one that left me with much food for thought. I always look forward to these post apocalypse stories and this one is especially inventive - almost incredibly so but also just about plausible. (the way in which Patrick Ness worked out the finer details is impressive) The characters are very engaging and I found myself sharing their fear in some of the bizarre events. I read this in two sittings and fully expect there to be a sequel, in which case I will read it again in order to get the whole story in one go. I can't wait!