The newest picture book from the creators of Iggy Peck, Architect; Rosie Revere, Engineer; and Ada Twist, Scientist stars Sofia Valdez, a community leader who stands up for what she believes in! 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.