It's really not that much. The outline makes it look like a book, but the truth is each of the 15 "chapters" range between a small and a medium sized post. Most of the subsections are one or two small paragraphs.
Non the less. The formatting makes it very hard to read. the information architecture isn't in any way better and the order of navigation (next, up, and so on) buttons is slightly strange.
For me the usability and readability suffered greatly and I really had a hard time grasping the basic concepts from the introductory chapters.
So I am still lost even while thinking, that there might be something more behind this concept.
It looks like a converted-to-html info manual. I've never found the next/previous parts quite intuitive (because they go down the hierarchy and then back up), though up at least makes sense.
