*Book review by Danyal Talpur*
The book the "theory of everything" is written by Stephen Hawking. This book is mostly about Cosmology. This book is comprised of seven lectures, these lectures are on the creation and the fate of the universe, Black holes, direction of time, and the theory of everything. The writing style of Stephen Hawking is very simple and easy, he illustrates very complex ideas with daily life examples.
In the first lecture, Stephen Hawking gives an outline of the history of the history of the universe, he gave a review of past ideas about the universe. He started his lecture from Aristotle's ideas and end it at our present belief about the universe.
In the second and the fifth Chapter, Stephen Hawking talked about expanding, origin, and the fate of the universe. In these chapters, he deals with questions like will the universe eventually stop expanding and start contracting? Will it expand forever? In these chapters, he also describes how time had begun at Big Bang? Stephen Hawking applies Quantum mechanics, the law of gravitation, and Einstein's relativity to prove that the universe must have a beginning and the universe could not be statistics.
In the third and fourth lectures, Stephen Hawking talked about black holes. He described how black holes are formed? What is inside the black holes? Will people be able to come out of black holes? The author proves his ideas with physics laws.
In the sixth lecture, Stephen Hawking discusses the direction of time. He described that does time travel is possible? Can we predict the future?
In the seventh and last chapter, Stephen Hawking described the ideas about the theory of everything. Actually, the theory of everything is not still given by anyone. There are some theories of science that are not unified with each other like Quantum mechanics and general relativity. However, one would hope to find a complete, consistent, unified theory that would include all these partial theories as approximations. The quest for such a theory is known as " the unification of physics." Einstein spends much of his latter time to unified all the theories but he refused to believe in Quantum mechanics. When all the theories will be unified, we shall really understand the universe and our position in it.
The theory of everything is one of the must-read books for science and cosmology lovers. Stephen Hawking illustrates highly complex ideas in a very easy way. I highly recommend every bookworm to read this book.