 The score has since been performed as a Symphonic piece in four movements for orchestra and soloist.The score and its production were the subject of an hour-long documentary film created for the behind-the-scenes features of The Desolation of Smaug, and is also to be featured in dedicated book by musicologist Doug Adams, set to be completed in late 2017.With these three scores added to the music of the Lord of the Rings, Howard Shore has composed over 160 leitmotifs for the Middle Earth films, creating by far the largest collection of themes in the history of cinema and one of the biggest collections for any cycle of musical compositions.