Waiting for quite long periods is not something so unusual for the Edain Community. I think there have been longer hiatuses in the past, which concerned more significant updates and overhauls. I perfectly know that it is so much better when there are regular news and when the Community gets to have many more things been showcased. But the problem is always the same: if something is still in development, there is not so much to show before those certain aspects are polished and eventually finalised. Add to this the departure of the leader of the developers.
Waiting, even if it seems to be for no reasons whatsoever, is a bitter reality to face. It's part of the whole experience, I would say. From my part, I can assure you that work is continuously going on (as they too stated). I hope that the remaining articles that deal with spellbooks will be released as soon as possible. Real and faithful fans understand all of this, whatever the difficulty may be.