The Sith Lord Darth Vilus produced more than three thousand volumes of writings during his life. The original copy of the writings was owned by Darth Thanaton and stored in his private library on Dromund Kaas. The public copy was doctored by Thanaton, who had volume 2,397 replaced with a duplicate of volume 2,455. After discovering the forgery, Lord Kallig had to break into Thanaton's library to access the original writings.