Book excerpt: The classic tale of the Three Billy Goats Gruff gets a cheeky twist in this picture book retelling. Trip trap, trip trap. “ACH! Who is that tap-tap-tapping on my bridge?” The story of the Three Billy Goats Gruff and the way they outwitted a hungry bridge troll is one of our most well-known fairy tales…but how exactly did it become so? It turns out, the cleverness of the Brothers Gruff isn’t limited to tricking trolls—they are also genius self-promoters! (Keep those goats away from Instagram!) Find out the rest of the story in this wily retelling.