In Viruses, young readers learn that although viruses are too small to be seen with only our eyes, they are made of atoms and molecules and are not considered alive by most scientists as they do not have all the parts of a cell. They can cause diseases and must live in other organisms.
 
Softcover, 8×8 in., 24 pages
Word Count 339,  Lexile Measure 480L
A pronunciation guide is included. Reading Level 1-3, Interest Level 2-5.