Shinga Kai Original Problem Collection Akahon (Red Book) All Volumes: 63 volumes, old edition Original price: Over 70,000 yen Purchased but hardly used. Stored at home. To check the contents, some volumes have been opened, but some have never been used, some have been copied once, and some are unopened. I also have the new edition, but there is not much difference in the content. Can also be used for future elementary school entrance exams. Priority given to those who purchase immediately. No price reductions or holds. Please understand that this is home storage and a personal inspection. Returns are not accepted as they can still be used. Thank you.