Archangel Tyrael, the Aspect of Justice is a tome found in Act IV of Diablo III.
It reads as follows:
Tyrael, the archangel of Justice, is a being of balance and integrity. His compassion for mankind has compromised his standing within the Angiris Council. He alone recognizes the nephalem's capacity to transcend their divided heritage and become the true champions of creation. — Selathiel, Angiris Scribe