Themes: Insects, Viruses, Nonfiction, Tween. Some of the scariest creatures in nature can take over the minds of others. That's how they get what they want. Their victims are zombie creatures. Red Rhino Books Nonfiction is the first Hi-Lo children's nonfiction series at a first-grade reading level for students in grades 4–7. Visually appealing fullcolor photographs and illustrations—along with fun fact boxes—keep these books flowing. Also includes prereading comprehension questions along with a 20-word glossary for further reading support.