Parasites

Parasites receive far less attention than viruses or bacteria, yet they cause a great deal of illness and hardship for animals and people around the world. The group is wide-ranging, from organisms too small to see, such as single-celled protozoans, to larger creatures like ticks, lice, and intestinal worms. Despite their differences, every parasite depends on another living thing to survive, and the host pays the price.

The book offers a basic introduction to these organisms, explains how they make their hosts sick, and covers ways to prevent infection and treat the illnesses they cause. Its subject is often off-putting, but the author presents these creatures in a way that is both informative and engaging for young readers.