Another laugh-out-loud monster adventure in the Billy and the Mini Monsters chapter book series, perfect for newly independent readers aged 6+ and fans of Claude and Horrid Henry. Billy is learning how to take care of the planet, and the Mini Monsters want to help too... so they join the school trip to the recycling centre. But what will happen when Gloop falls into the recycling machine? Packed with colour illustrations, comic strips, maps and speech bubbles, with an action-packed plot, to appeal to even the most reluctant reader.