Publisher's Synopsis
How to become the most POWERFUL BOY IN THE UNIVERSE.
1. Leave cheese-and-pickled-egg SANDWICH in lunchbox for thirteen weeks.
2. Open lunchbox to find that sandwich has turned into a TIME MACHINE.
3. Accidentally wipe out the DINOSAURS with a packet of custard creams.
4. Try to stop someone evil stealing the most POWERFUL SANDWICH of all TIME and changing the history of the universe FOR EVER.
