The 1964 Childcraft The How and Why Library Book Set 1-15 is a comprehensive encyclopedia set designed for children and families. Published by Field Enterprises Educational Corp in the United States, this set includes 15 illustrated hardcover books that cover a wide range of general knowledge topics. With various authors contributing to the collection, this set is perfect for beginners looking to expand their understanding of various subjects in an engaging and colorful format. The books provide detailed explanations and illustrations to help young readers learn and explore the world around them.