Science Comic Survival Series, set of the following 2 books: ① Survival in the Sea ② Survival in the Volcano Overall, there is some yellowing, but I believe they can be read without issue. Brief alcohol cleaning has been done. I hope you will consider purchasing after understanding that these are used items. * Even during price negotiations, the person who purchases first will be given priority. * The actual colors may differ from the photos due to lighting conditions. * There is a possibility of overlooking stains or writing. * These are used items, so there may be differences in subjective impressions depending on the individual; please check the photos and understand before purchasing. * Please refrain from purchasing if you are overly concerned about condition. * The shipping method may be changed from Rakuraku to Yuyu, or vice versa. * I will not respond to unreasonable price negotiations. * I will ignore offers that are just form letters or do not include a desired price. Please feel free to ask any questions to prevent trouble.