The book by the world famous astrophysicist, member of the Royal Astronomical Society Sir Martin Rees describes the fundamental forces that govern our Universe. The author argues that the expanding Universe can be defined by just six numbers: N, e, Ω, l, Q, D, each of which plays a special and decisive role in its evolution, and together they determine its development and potential. Two of them are related to the main forces; the other two determine the size and general structure of the Universe and indicate whether it will exist forever; two more talk about the properties of the Universe itself. If any of them were just a little different, there would be no stars and life could not exist. We could only come into existence—and still exist—in the Universe with the right combination of these fundamental numbers. Therefore, awareness of this gives a completely new point of view on the Universe and our place in it, as well as on the very nature of physical laws. Martin Rees managed to describe in accessible language, without the use of complex mathematical apparatus, the key concepts of cosmology, which is rapidly developing and today is at the forefront of science.