Complex sentence: The first novel volume was published on June 6,2003 by Kadokawa Shoten, and as of April 1,2007, nine volumes have been published, with a tenth planned for release.
Split into simpler sentences: The first novel was released on June 6,2003 by Kadokawa Shoten. As of April 1,2007, nine books have been published, with a tenth planned for release.