Annotation: "Just as knights in the Middle Ages wore armor to keep their bodies safe during battle, some animals have strong, hard coverings to keep their bodies safe from predators. Some animals have hard scales, shells, or thick skin that acts as armor. In this book, readers learn about the different types of armor that animals may have and encounter examples of each. Bright photographs grab the readers' attention, while a graphic organizer gathers key information in one place"--