Melaina's Memory is a tome found in Act V of Diablo III. Written by Melaina, it is dropped in Lair of the Prophet when the spark of Melaina's soul is touched. Obtaining the journal will add to the People Finder achievement.
It reads as follows:
We trained believing that we would fight together, but Eirena was the one who was chosen, and we were the ones who must sacrifice to support her. Why her and not me? A selfish question, for I know that if she was asked, she would say yes. So I did.
Melaina the Enchantress