The "How Things Work Volume 1-4 Complete Hardcover Book Set" by Roger Jean Segalat offers a comprehensive and educational look at various mechanical workings and business concepts. This historical nonfiction book set is intended for young adults, ages 9-12, and adults, providing in-depth explanations and illustrations to help readers understand complex systems and processes. The books cover a variety of topics within the genre of business, economics, and industry, serving as a valuable reference for those interested in exploring the inner workings of various systems and technologies.
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