DO NOT LICK THIS BOOK

Why not? Because “IT’S FULL OF GERMS.”

Of course, Ben-Barak rightly notes, so is everything else—from your socks to the top of Mount Everest. Just to demonstrate, he invites readers to undertake an exploratory adventure (only partly imaginary): First touch a certain seemingly blank spot on the page to pick up a microbe named Min, then in turn touch teeth, shirt, and navel to pick up Rae, Dennis, and Jake. In the process, readers watch crews of other microbes digging cavities (“Hey kid, brush your teeth less”), spreading “lovely filth,” and chowing down on huge rafts of dead skin. For the illustrations, Frost places dialogue balloons and small googly-eyed cartoon blobs of diverse shape and color onto Rundgren’s photographs, taken using a scanning electron microscope, of the fantastically rugged surfaces of seemingly smooth paper, a tooth, textile fibers, and the jumbled crevasses in a belly button. The tour concludes with more formal introductions and profiles for Min and the others: E. coli, Streptococcus, Aspergillus niger, and Corynebacteria. “Where will you take Min tomorrow?” the author asks teasingly. Maybe the nearest bar of soap.

Science at its best: informative and gross.