This is a story about trees and fungi connected through a "wood wide web" told by one tiny fungal spore. A little fungus meets a baby cacao tree and they learn to feed each other. They cooperate with a forest of plants and a metropolis of microbes in the soil. But when drought strikes can they work together to survive? The fourth book in the Small Friends Books series, this science-adventure story explores the Earth-shaping partnerships between plants, fungi and bacteria. Features: A beautifully illustrated science-adventure story, created in collaboration with scientists Engages children in the invisible world of microbes "The Science Behind the Story" section allows for deeper exploration of the scientific concepts underpinning the story Teacher Notes available to support the use of this book in the classroom The Small Friends Books series combines cutting-edge scientific research, rich narrative and beautiful illustrations to tell stories that describe symbiotic partnerships between microbes and larger life forms.