Drops will change with book 12 but at the moment:
First 4 pages drop from Morroval in Duvaire (Ram Duarth, Angmar).
Last 4 pages drop from Snowreap Goblins in Misty Mountains.
Description:
You are able to revive a fallen companion.
Hints:
Drops in the Uruk-Hai Cave in Angmar.