They slither and squirm. They're slimy and can be deadly. Parasites are the hidden invaders of our bodies. But studying these body snatchers can be, well, disgusting. Imagine a brain-eating amoeba that swims up your nose or a sneaky parasite that kills its host's tongue--and then becomes its new tongue! Featuring the latest scientific research, this humorous hi-lo book dives into the gross and weird world of parasites.Witty text sparks interest in STEM for reluctant readers, while fun facts, career features, and critical thinking questions deepen their understanding. Plus, a table of contents, glossary with pronunciations, further resources, and an index enhance comprehension.