Discusses how and why castles were built during the Middle Ages and what it was like to live in one.

Introduces the physical appearance, habits, diet, and habitat of this toothed whale and threats to its existence.

Describes the physical characteristics, habits, and natural environment of the large hairy spiders whose bite is not as deadly as was once believed.

Describes the physical characteristics, habits, and natural environment of the large, hairy spiders that build hinged trapdoors at the entrance of their burrows.

Introduces the physical characteristics, habits, and natural environment of the alligator.

An introduction to the physical characteristics, habits, and natural environment of various species of lizards that are able to change their skin color to blend in with their surroundings.

An introduction to the physical characteristics, habits, natural environment, relationship to humans, and future of the cougar, a cat that is found in both North and South American and known by at least five other names, including puma, catamount, painter, mountain lion, and panther.

Describes, in simple terms, the appearance, infancy, habits, behavior, and habitat of the dolphin.

Describes the physical characteristics, habits, and natural environment of the world's most common whale, the finback.

Describes gray whales, where they live, what they eat, and their family life.