【Fukuinkan Shoten】Small Science Friends, Set of 6 This is a set. *Individual sales are not available. ●Condition: This is a set of 6 books from April, May, June, July, September, and October 2021. I read them a lot, but there is no severe dirt or tears, and I think you can still enjoy them. Includes folded-in extras. Please understand that these are used items before purchasing.