Themes: Cloning, Science, Technology, Nonfiction, Tween. Learn about the history, potential, and dangers of cloning, from the first cloned salamander to Dolly the sheep and beyond. 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.