Book excerpt: The Rainbow Beneath My Feet includes step-by-step instructions to the process from collecting the mushrooms to dyeing the wool. There is an accurate and up-to-date description for each species along with over 200 color photographs. The scope of this work goes beyond the identification of species. The authors provide information about dyeing equipment, mordants, preparing and dyeing the wool, and the dazzling array of colors that can be obtained from mushroom.