① Mysteries of the Universe: Why? How? Read once and stored at home. (Quoted from the website below) From the mysteries of the universe itself, such as "How big is the universe?" and "What kind of place is the universe?", to the Earth, stars, and the workings of the universe, there are many mysteries that everyone doesn't know! This book answers children's simple questions that even adults struggle to answer, with easy-to-understand illustrations. ② Mysteries of Science: Why? How? Grade 4 Stored with the cover removed, and used for a period of time, so the coverless state shows more deterioration than the cover. Also, there are some pages of the book that are bent. Please refer to the photos. (Quoted from the website below) Questions that transcend time and space, such as "When did various creatures originate?" and "Are there any other planets like Earth where people live?", are difficult to answer, right? In this book, all the characters have furigana (phonetic guides) above them, so children in the 2nd and 3rd grades can also read it. ① Shows deterioration as it was stored at home. ② Has bent pages and is not in good condition. Please consider purchasing only if you understand the above. If you have any questions, please ask before purchasing. I can also add photos.