This Is Not My Hat by Jon Klassen

A tiny fish wears a small blue bowler hat that he stole from a sleeping giant fish, fully convinced he can pull off the ultimate undercover escape. As he swims toward the safety of the tall reeds, deadpan text clashes with hilarious visual cues that reveal the big fish is awake, aware, and hot on his trail. Jon Klassen’s 2013 Caldecott Medal-winning picture book delivers brilliant dark comedy, subtle suspense, and unforgettable visual storytelling.