Musty Tome
From WoWWiki
The Musty Tome is located in the city hall of the Ruins of Andorhal, Western Plaguelands. [43.5, 69.2]
Objective of
Has a chance to contain [Annals of Darrowshire] for the quest 
[56] The Annals of Darrowshire.
Notes
- Also has a chance to contain a [Ruined Tome] and summon 1-2 Decrepit Guardians.
- Has been noticed that the trick with this quest is to carefully examine the books on the floor. "Trapped" tomes that spawn guards have a clear white/gray split on their pages, whereas the real thing has a smooth transition from white to gray. This may only become apparent if you zoom in and highlight a book, but it's worth it to avoid unnecessary fights.
