Come meet the good, the bad, and the ugly—yes, germs! There’s so much to discover about germs. Did you know that germs make your stomach growl as they break down your food? Or that they can travel the world on anything from fleas and ticks to trains and buses? Told from the perspective of Sam the Salmonella, this informative picture book introduces young readers to helpful and harmful germs, exploring their discovery; the breakout of historic diseases; the invention of pasteurization, vaccination, and penicillin; and other fascinating details about the world of microscopic organisms. A Christy Ottaviano Book