A collection of stories answering children's questions, for first graders. Why? How? Science Stories for 1st Graders Why? How? More Science Stories for 1st Graders Mysteries of Society: Why? How? 1st Graders Mysteries of the Heart: Why? How? This is a set of 4 books. [Why? How? Science Stories] No cover [Why? How? More Science Stories for 1st Graders] Cover is attached to the main body with tape. There is a scratch on the thin paper on the page after the cover. [Mysteries of Society: Why? How? 1st Graders] Cover is attached to the main body with tape. [Mysteries of the Heart: Why? How?] Cover included. There are marks where the name has been erased on the back cover and cover. These items have been used by a child, so there is some wear and tear. Please refrain from purchasing if you are looking for new items. If you have any concerns, please be sure to ask questions before purchasing. Thank you for your understanding of used items and home storage.