Child Science Picture Book Library This is a set of picture books that allow you to enjoy learning about winter nature and events. - Series Name: Why, Why? of Winter - Volume: January Why, Why? - Volume: February Why, Why? - Volume: December Why, Why? - Contents: Explanations of winter natural phenomena and events - Publisher: Gakken Thank you for viewing. Although there are no noticeable stains or dirt, this is a used item that has been used by a child. Please understand this. Those who are concerned about the condition should refrain from purchasing. No individual sales.