Fungi are all around us, with mycelium stretching and branching to places we can't even see. Some fungi ooze a blood-like sap or look like colorful coral. Others connect trees, capture pollutants, or become building materials. While some are toxic, others are critical to making certain breads, cheeses, or medicines--and some are tasty all on their own. It's estimated that just 10 percent of fungi have been discovered. From the most well-known mushrooms to the mycelium hidden beneath our feet, this in-depth text digs deep into the incredible fungal world.