Sybil's Memory is a tome found in Act V of Diablo III. Written by Sybil, it is dropped in Lair of the Prophet when the spark of Sybil's soul is touched. Obtaining the journal will add to the People Finder achievement.
It reads as follows:
The Prophet said I would not dream... but I did. At first, they were dreams of color, unsettling, and then I began to hear voices. They called for me, over and over, and then I woke.
Sybil the Enchantress