Book excerpt: Fungi's role in making cheese is quite unsavory to think about, but the end result sure tastes good. Yeast, one fungus discussed, is the fungus that makes our bread light and airy. Readers will also learn about the gross things in food that are dangerous and how to keep safe from E. coli and other bacteria. They'll be surprised and grossed out, but ultimately enthralled as they learn about the foods they eat every day.