The full longlist was:
Genesis by Bernard Beckett (Quercus) (review)Summaries of all the books can be found on this Guardian round-up.
The Silver Blade by Sally Gardner (Orion)
Nation by Terry Pratchett (Doubleday)
Then by Morris Gleitzman (Puffin)
Rowan the Strange by Julie Hearn (Oxford)
Exposure by Mal Peet (Walker Books)
Solace of the Road by Siobhan Dowd (David Fickling Books)
Revolver by Marcus Sedgwick (Orion)
Read more about Exposure and the author Mal Peet, here, and read an extract from Exposure, here.