Urizen is described as having multiple books: Gold, Silver, Iron, and Brass. They represent science, love, war, and sociology, which are four aspects of life. The books are filled with laws that seek to overcome the seven deadly sins. He constantly adds to the works, even when he faces his opposition in Orc, but the books are destroyed in the Last Judgment. The Book of Brass sets forth Urizen's social beliefs that seek to remove all pain and instill peace under one rule. The attempt to force love through law encouraged the Eternals to put forth the Seven Deadly Sins that Urizen hoped to prevent. The Book of Iron was lost in the Tree of Mystery, and represents how Urizen can create wars but cannot control them.