CEFR B1 - HEADWORDS 1050. I'm the greatest criminal in this city. I've never been caught by the police, and I never will be caught,' said Cooger. But what was this clever -and dangerous -man planning? And could Ben and Rosie stop him from stealing Grandpa's inventions -and a lot more, too? Learners can complete activities whilst reading or after reading – some with supporting activities for the Cambridge Young Learner Test. Picture dictionaries and glossaries help with unknown words along the way. Listen along with downloadable MP3 audio.