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Grand Maester's Journal is a tome found in Act V of Diablo III. Written by Grand Maester, it is dropped in Templar Outpost after he is defeated. Obtaining the journal will add to the People Finder achievement.

It reads as follows:

Man is a flawed being. Time and again, we have seen good men give in to temptation. Though it is painful, I have found only one answer: we must cleanse the minds of our recruits so they will never fall prey to the corruption of the demons, or the blind self-righteousness of the angels.
— Grand Maester