I was under the impression that the HPMoR story was to entice people to become "more rational", that is, get them to read more of the "day-job" stuff. There was also supposed to be an actual book on rationality, but it looks like that's been put on hold as well. Which to me seemed like a wise decision, since more people were being led to simply read the sequences via HPMoR already, so why bother with a book?