Arelion's Journal

Arelion's Journal once belonged to Arelion, it details his escapades with a young female blood elf.

Source
Arelion's Journal is looted from Arelion's Knapsack, found at the Pools of Aggonar in Hellfire Peninsula. The knapsack is hanging from the branch of a bramble in the center of the pools.

It can also be dropped by any of the ooze monsters about.

As a quest objective

 * Arelion's Journal (quest)