Brian Greene managed the feat of introducing the most innovative scientific concepts browsing, chapter after chapter, the path of physics since Newton to the most recent discoveries and prospects, illustrating it extremely clear examples, and very often tinged with humor to make them more accessible. We enjoy the pedagogical approach of Brian Greene who, without equation, manages to make the reader understand such powerful concepts as special relativity, general relativity, quantum mechanics ... I have read the first explanation really clear inequality of Bell and its practical demonstration. And to top it all, Brian Greene peppers his speeches with quotes and historical anecdotes that make the work very exciting. So much so that, after completion, we can only say, "thin, already?". Although more accurate, informative and rich as the "Brief History of Time" by Stephen Hawking, who had left me a little on my hunger. To read at all costs.