The “gross factor” in this book is sure to attract readers.  This is a head-to-toe look at some of the microscopic organisms that live on or in our bodies.  Most microbes are harmless or help our bodies work properly.  Ways to prevent harmful pests from causing discomfort or illness are given.  Bold words are defined on the page as well as included in the glossary.  “Ewww Facts” provide additional information.  Large bright photographs accompany the text.  Microphotographs of the tiny “bugs” are colorful and labeled.  Books for further reading, internet sites for more details, games and activities, and an index are included.  Other books in the series tell of microscopic creatures living in our food, Food Intruders, living in our homes, Uninvited Guests, and in our backyards, Yard Monsters.