The World Book Encyclopedia is a world-famous encyclopedia, serving young readers and libraries. This book was published by the American World Book Publishing Company in 19 17. Since then, it has been added, deleted and revised year by year, becoming a regular encyclopedia of American families, ranking first in global sales. The world encyclopedia covers social science, natural science, culture and art, etc. The editorial board is composed of internationally renowned scholars, and more than 3,800 scholars and experts write articles, modify contents, make comments and provide consultation for the world encyclopedia. In addition, the American World Book Company has been conducting continuous surveys in schools in the United States and Canada for a long time to determine the changing needs of students. Special attention should be paid to readability in writing articles. The text of each entry can be suitable for the age characteristics of the readers who consult the articles the most. All words are used to meet the needs of readers. About 20,000 color maps and1more than 300 maps make the entries more vivid and intuitive. Many pictures were created by the American World Book Publishing Company, which commissioned specialized artists to work closely with photographers.