I just got done reading this fascinating book with my kids. I learned right along with them about the solar system. This is the fist of this series that I have read and was happy to do so. There were some things I have forgotten all about and my boys were happy to learn. Every school in the US should have this in their system. An easy way for kids to learn about things. I would not mind having my boys read the whole series and I will ask both of their schools if they have them in the library. If not I will ask them to look into getting them. A wonderful read!