This book covers in a simple rather complex questions about the universe around us, man's place in this vast and many more. The narrative is in the form of questions / answers. The idea is good but I think some of the questions supposedly posed by the granddaughter of the author are too complicated or wanted to emanate from the mouth of a teenager ... But above all, this book me a left little on my hunger. Indeed, as I understand it must be difficult to popularize complicated things such as the expansion of the universe, for example, I find that some of the responses are a bit too basic and could have deserved to be searched or slightly Detailed. It's a shame. Furthermore, I find it a little short. This book remains readable and can make people want to go further by arousing curiosity and / or the interest of the reader can then read other books more detailed / specific about any particular appearance. I am thinking against that although in theory it is affordable from 14 years (according to its author), it is not very suitable for teenagers of this age; I personally think that some aspects (nucleus, electrons, atoms, fusion etc ...) can only be truly assimilated to that 16 or 17 years that is with some basic scientific concepts.
