Why? Why? Manga Science Encyclopedia Series - Set of books. Includes: Why the Universe? Why Insects? Why the Human Body? Why Animals? Why the Earth? Why Venomous Creatures? Why Sports? Total: 7 books No individual sales. There is yellowing, stains, marks, scratches, and creases due to aging. In particular, the cover of "Why Animals?" has a noticeable tear, so please check the photos. The contents can be read without any problems. I have checked the books overall, but I have not done a detailed page-by-page inspection. Please forgive any oversights as I am a private seller. Please refrain from purchasing if you are looking for a perfect item, as these are used books stored at home. I do not accept price negotiation comments. Instant purchase is OK.