Book excerpt: There is beautiful mathematics in the natural world. In this book two children take an autumn math walk in search of interesting treasures. Colourful photos and an easy to access text invite both children and adults to explore the wonders of the autumn world. This book can spark mathematical conversations with children, and be used as a guide for discovering the rich math that exists in nature. Photos can also be used to engage children in math talks as they observe and discuss what they see. Mathematical facts for each photo are provided that can be used to prompt readers in learning more about how math shapes our natural world.