Although it's ostensibly for children, it also contains quite advanced content, making it perfect for children with a deep understanding or a strong curiosity. Topics like "How Society Works" are informative even for adults. This is a series of encyclopedias, and it seems a friend's child (a boy) has collected only the ones he's interested in. The binding is a heavy, leather-like material, making it durable and luxurious, with little wear and tear even after many years of use. ② Insects ⑤ Plants ⑩ How Society Works ⑫ Geography of Japan (Local 1) ⑬ Geography of Japan (Local 2) ⑭ History of Japan (Volume 1) ⑮ History of Japan (Volume 2) ㉑ Home Economics *Individual sales are not available.