The book starts out by giving some scales of the size and number of microbes, then talks about how they are everywhere. There are comparative images of large and small microbes, and then my favorite spread which shows lots of different kinds of microbes so you can see all the unique shapes and patterns.
The book then explains how microbes can eat anything and that they transform things into something else, like milk into yoghurt! Davies attempts to explain how rapidly they split and increase with a stunning visual across two pages.
The story finishes with talking about how "the wrong kind of microbes" can make you sick and some simple precautions (like washing your hands) but reassures readers that there are very few microbes that will make you sick. The book ends with two gorgeous spreads showing the amazing BIG things that tiny microbes can do. "They are the invisible transformers of our world."
Sutton's illustrations are the perfect accompaniment to Davies' simple but beautiful text. She draws both cozy, cheerful pictures relating the abstract idea of something so tiny you can't see to the things you can see, and also stunning, delicate illustrations of microbes themselves.
Verdict: This will work in a storytime with an older audience; probably four and up. It will also be a great book for teachers and families to enjoy in smaller groups to pique children's curiosity about the world around them. Highly recommend.