A simple theory: Despite the explosion of knowledge in the last few decades, much of physics still remains a mystery. We know little of how the universe really works, or how it came into existence. Fundamentals escape us--such as the actual cause of gravity. Even the behavior of light leaves us perplexed. For example, whiy does light maintain a constant speed? What regulates it? Why does it slow down as it passes through a crystal and then speed up on the other side? What energizes it? These are only a few of the exciting mysteries which Roy Masters brilliantly tackles.