Log Horizon: Collapse of the Round Table (translation tentative) is the twelfth volume of the Log Horizon light novel series. It continues after the events of Log Horizon 10: Homesteading the Noosphere.
The original web novel version was completed on January 7, 2017. The published version was slated for a September 30, 2019 release but has been delayed until further notice.
- These titles are unofficial translations and may change in the future.
- Princess of the Pastry Shop (パン屋の公女) (Profile: Akatsuki)
- The People of the Earth's Protector (大地人の加護者) (Profile: Saraliya)
- Winter Rose of Eastal (イースタルの冬薔薇) (Profile: Rezarick)
- Collapse of the Round Table (円卓崩壊) (Profile: Malves)
- Each One's Blessing (それぞれの祝福) (Profile: Touri Saiguu)
- Volume 12 has had a rather troubled production history:
- The volume's profile characters and item recruitment periods were revealed in March 2018 and was slated for a Summer 2018 release.
- No further news about the volume was heard until June 23, 2019, when an Amazon JP link for the volume was added only to be taken down shortly thereafter. It was put back up on July 1 before being taken down a few weeks later. On September 9, it was put back up again along with an entry on Kadokawa's own website; however, both links were taken down again on Sept. 17.
- New Land of Adventure, a side-story novel originally slated to release at the same time, was also delayed but was published on Jan. 13, 2021, the same day that Season 3 aired.
- Log Horizon: Illustrations by Hara Kazuhiro, an artbook containing all of Hara Kazuhiro's illustrations for the series over the series' 10-year history, included the illustrations to be used in volume 12, including the volume cover, colored illustrations, and character sketches.