elieved that the simplest mathematical proofs already exist in some ethereal book and a mathematician's job was to find them, to "read the book." In the same way, I felt that the explanation of intelligence was "out there." I could taste it. I wanted to read the book.РFor the past twenty-five years, I have had a vision of that small, straightforward book on the brain. It was like a carrot keeping me motivated during those years. This vision has shaped the book you are holding in your hands right now. I have never plexity, in either science or technology. You can see that reflected in the products I have designed, which are often noted for their ease of use. The most powerful things are simple. Thus this book proposes a simple and straightforward theory of intelligence. I hope you enjoy it.