Unwelcome guests? That’s putting it mildly! This book about parasites that live in your insides provides some gross information, sure to give many nightmares. Did you now that the guinea worm parasite is first found in Egyptian medical texts in 1400 BC? This evil parasite is still around today causing fiery pain in its victims. The bubonic plague, also called Black Death in the 1300s, is spread through fleabites?!?! There are so many fascinating and disgusting facts in this book. Upper-grade elementary or middle schoolers would enjoy grossing each other out with parasitic tales and facts found in this book! ( )