But yeah, there should've been more to this book. It's been hinted at but nope, goes nowhere
Like I said above, it's an alternate way to find out about the ritual (the whole truth about it). But it's redundant if you already know via Raphael. Maybe the book was originally supposed to play a larger role - dunno.
Yeah I read that response from you, but how does that work though? Obviously you gotta unlock the final page to get that knowledge I'll wager? Cause I know for a fact if you kill that last Dark Justiciar (the rat guy) before meeting Yurgir, you will automatically complete his contract and Raphael will make him a new deal but that way you don't get the knowledge about the ritual from Rapahel, Astarion is very pissed off at you (and possibly leaves if you fumble your skill checks, not sure if he also breaks up with you in the beginning of act 3 in that scenario).
Also, yeah my guess the book was very likely supposed to play a larger role. Just like you, we dunno. So much of the game was cut and rewritten...
