You are not alone in this. My wife was the same way, and I had to explain. I think they assume you'll read the books, but that's not good for those who aren't familiar with the overall story.
They assume too much! I really hate it when RPGs cross into text adventure territory and I oftentimes can't be bothered to read stuff that tend to be either fluff and/or boring lore. I kind of half-expect developers to voice-act or otherwise impress upon the player the importance of paying attention. In short; it would be better if the narrator read out at least vital bits.
