Private Notes -- DO NOT READ is a notebook of formulas and calculations belonging to Elbert Nermarc.
If asked why his wares are so inexpensive, 'Ten-Tongues' Weerhat reveals that he deals in (stolen) goods supplied by Ahnia. If confronted she quickly turns violent, and a note from Ten-Tongues mentioning the book is subsequently found. Weerhat is willing to give the book to the Nerevarine, who can return it to Elbert in exchange for a small discount at his shop in Craftsmen's Hall.
[Between scrawled calculations and indecipherable symbols, very little can be made of this text, save the signature: "Elbert Nermarc"]