Thank you for viewing. I believe these are from about 25-30 years ago. They have been stored at my parents' house for many years. As they are old, there are noticeable yellowing and stains, as well as minor scratches and scuffs, but I think there is no problem with reading them. If you don't mind old items, are looking for something cheap, or for your children's studies, how about these? Shueisha Edition Learning Manga 7-Book Set "World History" ① Dawn of Civilization and the Pyramids ② The Empire of Alexander the Great ③ Qin Shi Huang and the Great Wall ④ Charlemagne and Joan of Arc ⑥ Muhammad and the Islamic Countries "World History Biographical Dictionary" *No cover "Japanese History Biographical Dictionary" Please check the condition in the images. The main issues are yellowing and stains on the top, bottom, side edges, and inside, and a tear in the obi (paper band) of "Joan of Arc." In addition, there are also minor scratches and scuffs on the front and back covers. Also, I think there is a slight smell characteristic of old items. When listing, I have wiped them clean as much as possible with alcohol disinfectant. Please understand that these are used items, that the inspection is done by an amateur (there may be oversights!), and that they are stored at home before purchasing. Please refrain from purchasing if you are concerned about minor details or are sensitive to the condition. Shipping may be changed from Yu-Yu Mercari Bin to Raku-Raku Mercari Bin. There are no smokers or pets in my family. Thank you. #LearningManga #WorldHistory