The more we learn about fungi, the less makes sense without them. Neither plant nor animal, they are found throughout the earth, the air and our bodies. They can be microscopic, yet also account for the largest organisms ever recorded. They enabled the first life on land, can survive unprotected in space and thrive amidst nuclear radiation. In fact, nearly all life relies in some way on fungi. An original and beautifully written blend of science, memoir, nature writing and philosophical enquiry.