Page from The Purple Hills of Mac'Aree

Forty pages can be turned into a Chapter from The Purple Hills of Mac'Aree.

Source
While one is provided for the quest, the rest must be looted from Demonic Archaeology Find digsites in Val'sharah. It is also dropped by Wyrmtongue Collectors in that zone.

As a quest objective
This item is a quest objective of The Purple Hills of Mac'Aree (quest).