The daring undercover agent and Caldecott medalist David Wisniewski wears multiple disguises as he continues to reveal the real reasons why grown-up rules such as #23: Brush Your Teeth, or #87: Clean Under Your Bed, exist. Whether facing killer dust-bunnies or risking stomach mood swings, David Wisniewski goes beyond the "official reasons" to bring kids the facts! His satiric humour and dazzling cut-paper artwork will captivate fans of the best-selling The Secret Knowledge of Grown-ups and enlighten new readers as well!