For the Great Evil, see Baal.
Baal, the Lord of Destruction is a tome found in Act II of Diablo III.
It is found in one of Cain's Lost Satchels. Reading it adds to the Judge of Character achievement.
It reads as follows:
Baal was the most brash and reckless of the Prime Evils. After the Dark Exile, he was contained within the Horadrim Tal Rasha and entombed. Centuries later, Diablo freed Baal, who then corrupted the Worldstone to devastating effect for the Barbarians who lived near Mount Arreat. The heroes killed Baal shortly afterwards. — Deckard Cain