This is a great book because of the ick factor combined with science facts. The photographs are excitingor gross. Look at the huge claws of head lice, enlarged 80 times. With an introduction of scale and the tools used, such as a scanning electron microscope or light microscope, the reader will have a good understanding of how big these body invaders are. The bedbug, that is enlarged 110 times, is frightening even if one reads that the bite does not hurt because of the anesthetic injected. Explanations, such as lenses are curved pieces of glass and saliva is spit, help the reader increase their vocabulary. There are many fearsome facts such as the mosquito can smell your breath or sweat from 100 feet away and head lice live about a month if not treated. One of the many sidebars is “know your foe” and they are packed with great, solid science information. There is a glossary, an index, and a list of books and websites to explore more. Readers will be drawn in by the compelling photographs and will thoroughly enjoy learning about body invaders. Reviewer: RevaBeth Russell; Ages 8 to 12.