A One-Round Continuous Living Greyhawk Sheldomar Valley Meta-Regional Adventure
From the introduction:
The beneficiary of your collection of rare tomes and documents has contacted you again. It is a matter of life and death for the Valley, but first it's a matter of trust between you and your mysterious employer. Are you willing to find out her intentions?
A Sheldomar Valley metaregional adventure for [character levels] 6 - 16.
Stanza Two in the Idyll of Tysiln.