No doubt that you will really enjoy the reading of this very well written little book *Seven Brief Lessons on Physics* from Carlo Rovelli, currently directing the quantum gravity research group of the Centre de Physique Théorique in Marseille, France

The brief lessons cover seven areas in modern physics — relativity, quantum mechanics, the structure of the universe, particle physics, quantum gravity, probability and black holes, and finally, how all these topics relate to us mere mortals.

In lesson 5, Rovelli exposes the concept of '** Big Bounce**', a direct consequence of the

**loop quantum theory**, which states that our universe was never a singularity but that instead it 'rebounded' after collapsing from its previous state like a spring.

To put it in a nutshell, seven accessible and enjoyable lessons, with only one formula across all the book: Rovelli did not resist the temptation to show us the simplicity of the Einstein's equation which links spacetime curvature to matter-energy!

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