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.

This beloved New York Times bestselling picture book is a fun-filled, inspiring story about the power of teamwork and the importance of celebrating individual gifts and self-expression.

And now you can follow Iggy's further adventures—with his friends Rosie Revere and Ada Twist—in the instant New York Times bestseller Rosie Revere and the Raucous Riveters, an all-new chapter book starring The

Blue River Creek has a problem: There's a pet thief on the loose! Or at least, Sofia and Iggy are convinced that there is, once their pets go missing. But as a scientist, Ada knows it's important not to jump to conclusions and to follow the facts. How will they find out what really happened to the town's pets? By using