Thank you for viewing. This is a set of Gakken's pictorial encyclopedias, volumes 1-12. As a bonus, I'll include the two books in the third photo. Volume 6, "The Human Body," is missing its outer cover. They were kept on a bookshelf, so the outer covers have some discoloration (as shown in the photos). These books were used by children, so there may be some minor stains inside. I believe they were used without any writing, but there might be something I missed. For those who understand that these are used items, thank you for your consideration.