This is not really important at all, but for the sake of mystery and purpose, I feel that the book or dark rituals should be located under the artifact label instead of the material. Even though the artifacts that we have now have no purpose, I feel that the book deserves that title instead of just another material. Well this is just a small suggestion for the future events.
It should still retain all of the options that it can do now like being traded and activated for boss fight, but be labeled as an artifact.
Artifacts can't be given. The book of rituals can be given to that cutie of a kat at Moorcraft. So, book goes under material list.
It has always worked that way, and another patch would not be really necessary since the event ends kinda soon.