Text and photographs present the physical characteristics, habits, and natural environment of various species of wolves.

Describes the various parts of the brain and the nervous system and how they function to enable us to think, feel, move, and remember.

An introduction to the physical characteristics, behavior, and life cycle of different kinds of spiders.

Describes the location, nature, development, measurement, and destructive effects of tornadoes, as well as how to stay out of danger from them.

Describes the skeletal system and outlines the many important roles that bones play in the healthy functioning of the human body.

Describes the atmospheric conditions which create thunderstorms, hailstorms, lightning, tornadoes, and hurricanes and how violent weather affects the environment and people.

Introduces various mountain ranges, how they are formed and shaped, and how they affect vegetation and animals, including humans.

Explains, in simple terms, the characteristics of volcanoes and describes some famous eruptions and their aftermath.