Its a short one.
The Magister Duskwither's Journal is located in Duskwither Spire of Eversong Woods. [69, 52]
Objective of[]
Contains 
[Magister Duskwither's Journal] for the quest 
[1-30] Abandoned Investigations.
Notes[]
This book was once overlooked most of the time, until 
appeared above quest givers.