Living at the edges of our normal perception, mosses are a common but inconspicuous element of the natural world. We only occasionally notice them in the cracks of city asphalt, on tree trunks or the surface of stones. Bryologist Robin Wall Kimmerer's book is not an identification guide or a scientific treatise. Rather, it is a series of interconnected personal essays about the lives of mosses intertwined with the lives of countless other creatures, from salmon and hummingbirds to fungi, bacteria and country gardeners. Kimmerer explains the biology of mosses in a fascinating way, while also reflecting on what these amazing organisms can teach us. Drawing on her varied experiences as a scientist, mother, Native American, and professional observer accustomed to peering to see what matters, Robin Wall Kimmerer tells the diverse stories of mosses in scientific terms, but also within the framework of indigenous ways of knowing. In her book, the natural history and cultural relationships of mosses become a powerful metaphor for the way of life in the world.