Any dragon priest - Amongst the Draugr & The Dragon War
Miraak - Guardian & the Traitor & Cultist Orders
Otar the Mad - The Secrets of Ragnvald (Currently not found in game)
Rahgot - Alchemist's Note, Rahgot's Reply & Note
Vahlok the Jailor - Guardian & the Traitor
Suleyk - Anduril's Journal
Ahzidal - Ahzidal's Descent
Zurin Arctus, The Underking - The Arcturian Heresy, Varieties of Faith in the Empire, Where Were You When the Dragon Broke?, Response to Bero's Speech, The Art of War Magic, Mysterious Akavir
Ysmir Wulfharth - The Five Songs of King Wulfharth, The Arcturian Heresy, Song of the Askelde Men, The Tale of Dro'Zira, Rislav the Righteous, The True Nature of Orcs
Konahrik - Konahrik's Poem