Five friends, four pranks, one headmaster

**What is this book about?** In **“Five Friends, Four Pranks, One Headmaster”**, a normal school day turns into a hilarious and suspenseful adventure at Regelberg Elementary School. What begins as an ordinary Monday morning quickly becomes a battle between strict rules and creative fun. The hallways smell like freshly mopped floors, the teachers are unusually tense, and a strange new system is wa...