Tarn's diary

Also titled The Diary of Tarn Razorlor.

Tarn's diary is a book that chronicles how Tarn came to be in the dungeon where he is and how he got involved in the dark arts of necromancy. Additionally, the book contains some magic elements. When used with a Salve amulet, it will enchant it and increase the benefits gained to a 20% boost in strength and accuracy against the undead.

The diary can be found on the table in the room just past where you fight Tarn Razorlor, and after that will be on the shelves in your house.