Have you ever bought a book in which what you needed was at the end, but you needed to read from the beginning in order to be able to understand the end? I have had this experience in the mathematical subject called analysis, and my pages on that subject are designed to enable the reader to begin at the end. It's like having a helicopter let you off at the peak of a mountain. The hyperlinks quickly let you move down to the base, which consists of the foundational ideas. Then, in order truly to appreciate the mountain, it would be necessary to walk back up. It would be necessary to study the pages in what we would call the normal order. Because of the mountain analogy, I use the expression "peak to ground" to describe the "end first" approach.