Investigation Notes was likely written by Versen Wranlock, who was investigating Selûnites in the Shadow-Cursed Lands. Reading the book initiates the quest Investigate the Selûnite Resistance.
This book is redolent with the enticing smell of paper and ink
Properties
Author: Versen Wranlock
Rarity: Common
Weight: 0.5 kg / 1 lb
Price: 14 gp 
UID
S_SCL_InquisitionLedgerUUID
1e90ae65-f0aa-4b85-b85e-c67a1a9fac40
Where to find
- Carried by the corpse of inquisitor Verzen Wranlock at Ruined Battlefield X: -35 Y: -88
Text
[The ledger is filled with tight, precise handwriting that seems to suggest a focused, analytical mind.]
A fresh lead has been volunteered by one of the guests in the dungeons - praise Lady Shar for inspiring the inventor of thumbscrews.
The guest spoke of an abandoned house (see map coordinates included) that was once said to belong to a potter, but is now being used as a clandestine place of worship for Selûnite holdouts and their sympathisers. There is a chance, of course, that the guest offered up false information in a bid to end his suffering, but I suspect not - his confession had the ragged, unpolished air of truth to it.
I shall endeavour to investigate at once, and cautiously - best if I am not seen, and should I find any Selûnite idols or texts, I can summon reinforcements and lay a trap.
Oh what a joy it shall be to see their faces when they are caught in the act, surrounded by dark cloaks.
Verzen Wranlock, Inquisitor to the Church of Lady Shar.