The entire series has been collected into the following hardcover volume:

The series is now 10 hardcover volumes instead of 7 in paperback.

A hardcover volume containing all 5 issues was released on October 15, 2008.

A hardcover volume containing all 6 issues was released on April 21, 2009.

A hardcover volume containing all 5 issues was released on August 17, 2010.

Due to its length, the story was published in four hardcover volumes.

The book is available as a single hardcover volume or a series of four paperback volumes.

The series has been collected into a single hardcover volume:

The series was collected into a single hardcover volume in July 2011.

The work was collected as a hardcover volume in 1999.