Quests starting in Isengard

NameLevelZoneArea
Book 4, Chapter 21: Servants of Saruman 72 Isengard Isengard 
Book 4, Chapter 22: Feed the Prisoners 72 Isengard Isengard 
Instance: In The Presence of Saruman 72 Isengard The Tower of Orthanc 
Instance: The Wizard's Vale 72 Isengard Isengard 
Raiding the Larder 72 Isengard Isengard 
Their Best Interests 72 Isengard Isengard 
Trival Business 72 Isengard Isengard 

Quests involving Isengard

NameLevelZoneArea
Book 4, Chapter 20: In The Presence of Saruman 72 Isengard Depths Isengard Depths 
Book 4, Chapter 25: Final Preparations 72 Isengard Depths Isengard Depths 
Instance: Escape from Isengard 72 Isengard Depths Isengard Depths 
Isengard: Dargnakh Unleashed 75 Middle-earth Global 
Isengard: The Foundry 75 Middle-earth Global 
Isengard: The Tower of Orthanc 75 Middle-earth Global 
Task: Blotchy Skins (Forthbrond) 71 Gap of Rohan Isendale