Mega Man Zero Official Complete Works

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) 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. A 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.

The book has (roughly) 180 pages and is in full color. The contents are divided by introduction, main character, enemy and boss characters, Cyber Elves, and special contents (sketches, interviews, items, game voices, and others). This book also features exclusive interviews with the series creators.

As the title implies, this is a book about the art of the Mega Man Zero continuity, and will not feature the rest of the Mega Man lexicon (However, it does hint at Mega Man X7 and X8 as being canon with the X series since it references the Orbital elevator.).

Differences between versions
From available previews of the book:
 * The English version of the book has a special foil cover.
 * Most of the bosses' EX Skills (a attack used only when the player has rank A or S) have a different name of Zero's EX Skills in the Japanese version of the book. The English version uses the same name of Zero's EX Skills, including translations for skills that where not translated in the games like Phoenix Magnion's Tenshouzan (Heaven Rising Cut) and Kuwagust Anchus' Sengatotsu (Rotating Fang Thrust).
 * The name of the Four Guardians' armies have a different translation from the games, being more literal. For instance, Phantom's Zan'ei Army is called the Cutting Shadow Squadron.