Late to the party here.
Took the survey, realized I'm quite the loser for never having taken the time to read the books. Seems they make for a large percentage of the storyline content.
As for the last question, I am definitely interested in a concentrated source of BIONICLE content. I've recently gotten my little brother into BIONICLE and he's relentlessly diving into the story. He started on MNOG and is reading the comics, building the sets, and going for any bit of content he can get his hands on. I've explained to him that BIONICLE isn't like the average kiddie story where the ankle-deep lore is all thrown at you - for BIONICLE, half of learning the lore is actively exploring it for yourself. A concentrated source of BIONICLE content would indeed reduce the frustration in hunting down the content by ones' self.