Sword Art Online - Calibur (ソードアート・オンライン キャリバー, Sōdo Āto Onrain Kyaribā?) is a manga adaption of the Sword Art Online light novel series by Kawahara Reki. This adaption covers the Calibur story of the original series, which is composed of part of the Volume 8 of the light novel. The manga is illustrated by Kiya Shii and was published as part of the monthly Dengeki G's Comic magazine. It continues the story of the Phantom Bullet manga, while the events in the Mother's Rosario manga take place after this manga, although the Calibur manga began serialization later than Mother's Rosario.