Books in Let's Investigate. Plants series

Surveys the person and the office of the president of the United States, covering such aspects as its history, the role of the first lady, the vice presidency, life in the White House, and campaigning.

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Discusses what sand is, how it is formed, how beaches and dunes are built up, how concrete and glass are made from sand, and how animals and plants survive in the desert

Introduces the United States military forces, their purposes, and what it is like to serve in the military.

Traces the history of ballooning from the eighteenth century to the present and discusses different kinds of balloons and their uses in science, travel, and sports

Provides information on riding a motorcycle, motorcycle engines, the various uses of motorcycles, and presents a relevant historical timeline.

Provides a simple history of money as it replaced bartering, explains how some types of money are made, and shows how things such as checks and credit cards serve as invisible money

Describes how wheat, rice, corn, and other grains are grown and harvested and how they are processed into various foods, and discusses their nutritional value and the role of various cultivated grains in history.

Introduces all kinds of maps including weather, topographic, road, and undersea; and explains such terms as scale, projections, symbols, latitude, and longitude.

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Examines the importance, structures, equipment, operations, and different kinds of farms