Researching the Khazra is a tome in the first act of Diablo III. It is needed to complete the achievement Historian of Tristram.

The tomes Researching the Khazra, Khazra Heads Wanted and The Khazra Massacre drops from Decaying Corpses that are found in the Highlands (both South and North).

It reads as follows:

"My loutish companions have no curiousity about the Khazra; they are only interested in the bounty on their heads. But I am convinved the Khazra can be communicated with. It is dangerous, to be sure, but it is a risk I am willing to take."
~Belard the Scholar
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