- Main article: Books (Oblivion)
- Basement of Benirus Manor, in a secret chamber.
A mysterious, blood-stained lexicon belonging to Lorgren Benirus. Found during the quest Where Spirits Have Lease (Anvil). It is on a desk at the entrance of the secret chamber where Lorgren's body is found. The book only has two pages, illustrated with hectograms and with the symbol of the Order of the Black Worm as background smeared with blood.
The text (in daedric runes) on the first page reads "The First" and "The Last". It is likely a tool; used for one to become a lich. The circular rune on the second page is also displayed on the wall of Benirus Manor's basement, acting as a portal to Lorgren's secret Laboratory.