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By the Author
![Universal](https://www.hachettebookgroup.com/wp-content/uploads/2017/06/9780306822704.jpg?w=190)
Universal
![The Quantum Universe](https://www.hachettebookgroup.com/wp-content/uploads/2017/06/9780306821448.jpg?w=190)
The Quantum Universe
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Why Does E=mc2?