One way to think about this book is that at various points along the way I have stopped at seven o'clock and "written it up." This book is a collection of those stopping points where I was able to freeze in time the provisional solutions to the problems I was facing. When the time came to collect and integrate them into this book, I got to take one more pass. In most cases, I found that what I had put down needed little modification. The result, stabilized by several previous and subsequent iterations around the clock, had withstood the test of time. |