by Brown, Matt | Children's, Teenage & educational
Published 01/06/2014 by Usborne Publishing Ltd as part of the Compton Valance series
Paperback | 208 pages, Black and white throughout
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.