I got the impression that Bhaal just wants to paint the world red, and Bane - or at least Gortash - seems to see it as an efficient tool for control.
It would probably easiest to tone down the content of that book so it only vaguely hints, rather than outright tells. Still it would be nice to be able to talk to your companions about it and get input from them as your investigation progresses. In the beginning you have quite a lot of conversations about the tadpole, but as the story goes on those nearly vanish, even as you learn that the Emperor is struggling more and more to keep the influence of the Brain at bay. In act 3 there is another document detailing how the Crown was modified to be used as a tool to dominate the Brain (instead of giving the Brain all the power) and this too does not inspire comments from your team mates.
