Black Book Quests are Dragonborn Sidequests available as part of the Dragonborn
Discerning the Transmundane - The Elder Scrolls V: Skyrim Guide - IGN
Chop Wood - The Elder Scrolls V: Skyrim Guide - IGN
No One Escapes Cidhna Mine - The Elder Scrolls V: Skyrim Guide - IGN
Alduin's Bane - The Elder Scrolls V: Skyrim Guide - IGN
Lore Books - The Elder Scrolls Online Guide - IGN
Hitting The Books - The Elder Scrolls V: Skyrim Guide - IGN
Unfathomable Depths - The Elder Scrolls V: Skyrim Guide - IGN
Darkwater Crossing - The Elder Scrolls V: Skyrim Guide - IGN
Black Book: The Winds of Change (Quest) - The Elder Scrolls V
Dragonborn Sidequests - The Elder Scrolls V: Skyrim Guide - IGN
Forbidden Legend - The Elder Scrolls V: Skyrim Guide - IGN
Skyrim - The Elder Scrolls Online Guide - IGN