Grades K-3. Who wouldn’t be fascinated by organisms that can eat anything: plants, animals (alive or dead), even oil and rocks? English biologist Davies introduces the strange realm of microbes: their minute sizes, their vast numbers, their diverse forms, and their varied roles in shaping our world. Simply written and concise, the text opens with comparisons that describe just how small these microorganisms are, noting that the picture of an ant would need to be as big as a whale in order for the millions of microbes on its antenna to be visible. While the analogy comparing the number of microbes in a teaspoon of soil to the population of India may be challenging for some young children to grasp, the colorful painting illustrating the idea could serve as a jumping-off point for further discussion. The information that some microbes cause illness is placed within the context of the many amazing things they accomplish. Reminiscent of Alice and Martin Provensen’s artwork in its combination of formal structure and amiable tone, Sutton’s large-scale illustrations help children to visualize microorganisms and processes that are too small to see. The sequence of simple images illustrating multiplying microbes is quite effective. A handsome and rewarding picture book about the power of tiny creatures.