He employed his leisure in writing for the centenary celebrations of the Wars of Liberation, a remarkable book on Imperial Germany, extolling its achievements and defending the main lines of his own foreign policy. In a revised edition of his book on Imperial Germany, published after the start of the First World War, he omitted or altered many passages that seemed compromising in light of the war like his policy of lulling Britain into a false sense of security while the German Navy was being constructed. He was understood to be in deeply malodorous company with Wilhelm, who never forgave him his attitude and action with regard to a 1908 interview in "The Daily Telegraph".