A First book

Discusses the use of new technology in efforts to retrieve artifacts from the ocean floor, the exploration of shipwrecks such as the Vasa, Mary Rose, and Titanic, and the recovery of the Challenger spacecraft.

Describes the various ice age periods throughout history and prehistory and explains how and why they occur.

Describes the conception of the space shuttle, its construction, its functions, and its potential for future space travel.

Describes the immediate and long-term health hazards of smoking, including the dangers of passive smoking and the risks to pregnant smokers.

Surveys the history, geography, and economy of Pennsylvania and describes its important cities, government, and people.

An introduction to airplanes, discussing principles of flight, airplane engines, air safety, airplane history, and various kinds of airplanes including the space shuttle.

Discusses the life of women--black, white, and Indian--in the western United States since 1818.

Introduces the physical characteristics, behavior, and natural environment of various species of penguins.

Biography of naturalist John Muir, whose love for the wilderness and battles on behalf of the environment, inspired him to found the Sierra Club.

Discusses the history, equipment, and basic techniques of surfing, as well as safety issues and surfing etiquette.