World of Darkness: Blood & Silk (referred to within the text simply as Blood & Silk) is a historical sourcebook for Kindred of the East that brings the game into the timeline of Vampire: The Dark Ages. Blood & Silk diverges somewhat from the default assumptions and mechanics of Kindred of the East: in the time of the Dark Ages, the titular vampires (the Wan Kuei) weren't yet called the Kuei-jin, and the Fifth Age had yet to begin.