Log Horizon (Web Novel)

The Log Horizon web novel is how Mamare Touno first published the Log Horizon series before it was picked up for a light novel release. He began uploading chapters on Syosetu on April 13, 2010, and has continued publishing web novel chapters there even after the series was officially published.

The web novel is effectively a rough draft for the final light novel publication, and occasionally has major changes from the final product.

List of Web Novel Chapters
Disclaimer: Volumes 12-14 have some spoiler summaries, but they may be inaccurate and some chapters were missed. The following volumes were previewed at the Re:Fraction event, but have not been released anywhere:
 * Volume 15: Coppelia, Tiered Islands (コッペリア；ティアード・アイランド)
 * Volume 16: Theldesia's Friday (セルデシアの金曜日)