For children between the age of 9 and 13, this series of books emphasizes the inspirational role of numerical culture in their growth and development. Based on the numbers zero to nine, it explores the five major areas of art, people, nature, architecture, and equations to create a series of engaging pictorial texts with unique meanings. This design not only stimulates children's imagination but also guides them through stories to explore the wonders of “numerical civilizations” around the world.