Jaime's Personal Journal

 is the journal of Jaime, who can be found in the Dunwich Building. Entries 1-7 are in the first level, entry 8 in the second level (Forsaken Dunwich Ruins), and the final tape in the Virulent Underchambers. The book mentioned in the Journal is Probably the Krivbeknih. It has a Quest based around it in the Point Lookout DLC called The Dark Heart of Blackhall.