I was misled by a comment buyer who praised the book. Given its price and commentary, I expected to find a great work, a sum that would have allowed me to see myself. But this book is small due to its content and its dimensions. It is even less than "Heaven and the Universe: Cosmology, astronomy and space exploration." I'm always looking for a book general public a little more sharp and complete regarding physics, while remaining not too complicated. This may be squaring the circle. I found beyond an initial response in small cheap books of Stephen Klein.