 Barsidious White (the antagonist in House) was created by Marsuvees Black (from the Paradise series) by using one of the blank books of the Books of History.In Skin some of the characters interact (via a dimensional rift) with characters from the Lost Books series.All the books in the Saga (Black, Red, White, Green, Chosen, Infidel, Renegade, Chaos, Lunatic, Elyon, Showdown, Saint, and Sinner) contain and explore the powers of the Books of History.