The Inventors Duel

My LI's are to inference information using the QAR strategy, To identify the main parts of the story and to predict using pictures, titles etc. I learnt that Baron von spanner challenged Emma's grandpa to an inventors duel and he had once been the Grandpa's apprentice, Emma and her Grandfather must win the competition or else the Granddad won't be allowed to invent anymore! luckily the same rule applies to the Baron. I learnt this by reading the book and also predicting what was going to happen from the cover and pictures.