Krivbeknih

The Krivbeknih is a strange artifact in the Fallout 3 add-on Point Lookout.

Background
Said to possess a dark power, The Krivbeknih was mentioned to have been owned long ago by Constance Blackhall until it went missing. The swampfolk now possess it, and use it in their rituals. This book is the one that Jaime Palabras' father was searching for, as mentioned in the personal journal holotapes found throughout the Dunwich building.

Marcella wants the book destroyed, but Obadiah Blackhall wants the book returned to its rightful owner, him. Upon taking the Krivbeknih from the ritual site, objects on the table behind it will start to shake and fall off the table.

Behind the scenes
The Krivbeknih is a reference to the many esoteric and arcane tomes featured in the Cthulhu mythos, written by H.P. Lovecraft, such as the Necronomicon, Book of Eibon, Pnakotic Manuscripts, etc. These artifacts play a similar role in the mythos, often being used by evil men for sinister purposes.

The Dunwich Building, where Marcella instructs the player to destroy the book, is a reference to Lovecraft's short story "The Dunwich Horror" and an audio tape recovered in the building contains a reference to "Alhazred", the fictional author of "Necronomicon".