In the newest picture book in the mega-bestselling Questioneers series, Sofia Valdez fights for change and finds her voice as a community leader! Every morning, Abuelo walks Sofia to school . . . until one day, when Abuelo hurts his ankle at a local landfill and he can no longer do so. Sofia misses her Abuelo and wonders what she can do about the dangerous Mount Trashmore. Then she gets an idea-the town can turn the slimy mess into a park! She brainstorms and plans and finally works up the courage to go to City Hall-only to be told by a clerk that she can't build a park because she's just a kid! Sofia is down but not out, and she sets out to prove what one kid can do.