Mega Man Zero Official Complete Works (ロックマンゼロ オフィシャルコンプリートワークス Mega Man Zero Official Complete Works? Rockman Zero Official Complete Works) is a book with a collection of illustrations, character designs, concept art sketches, location designs and much more artwork and information from the Mega Man Zero series. The book was released in 2006 in Japan by Capcom. An English version was planned to be released in 2007, but was delayed several times to the point of pre-orders being temporarily cancelled until its release in May 28, 2008. The English version was published by Udon.