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's going to a SLEEPOVER PARTY, at his best friend Ash's house. He's VERY excited but then everything starts to go WRONG. Sam's feeling sick, Jack is scared and Ahmed has INJURED his foot. Will the sleepover be a TOTAL DISASTER, or can Billy and his Mini Monsters show that being with friends is what matters most of all? Packed with colour illustrations, comic strips, maps and speech bubbles, with an action-packed plot, to appeal to even the most reluctant reader.