Tom Gates - Monster? Welches Monster?

The strangest and hilarious things happen again: Class 5F gets a very, very strict substitute teacher, the first music festival takes place in the city and Tom is allowed to play a monster at the school performance. Disasters are programmed. In addition, there are some puzzling things about school: Marcus' food is always stolen from his backpack (usually something with sausages), the pantry is a pile of rubble and there is a box on the playground that moves magically (okay, that is probably just the wind). What's going on there? Is it haunted at school? Tom is of course in top form and does not miss any opportunity to plunge his environment into chaos.