Stranded! (Paperback)

The school bus that turns up early for once, in a storm, isn't their usual bus - or driver, either. Instead of arriving at the school gates, they find themselves abandoned in a field. their driver's left his clothes and a coded note behind. Where is he, and can they crack the code? Can the group find their way home and stop the spies plot before Kadie Hall's insulin runs out and History changes forever?