Quests starting in Katub-zahar

Name	Level	Zone	Area
Riddles in the Library	51	The Great Delving	The Great Delving

Quests involving Katub-zahar

Name	Level	Zone	Area
Book 2. Chapter 3: Zigilburk the Unrivaled	53	Durin's Way	Durin's Way
Book 2. Chapter 4: Enemies in the Ever Dark	53	Durin's Way	The Chamber of the Crossroads
Securing the Library	52	The Great Delving	The Great Delving