Discover the fascinating world of science and invention with this vintage encyclopedia set of 21 "Illustrated Science and Invention - How It Works". This hardcover picture book series is perfect for young adults (ages 9-12) and adults alike who are interested in mathematics, sciences, engineering, technology, business, economics, and industry.

Each book is beautifully illustrated and contains information on a wide range of topics, including reference, inventions, science, and historical events. This international edition set was published in 1977 by Stuttman and weighs 32 lbs. Don't miss out on the opportunity to add this unique and informative set to your collection.