Sword Art Online Alicization Rising Novel Volume 12 is written by Reki Kawahara with illustrations by Abec.

After a brief respite, Kirito and Eugeo set off again to climb Central Cathedral-but the powerful Integrity Knights are not about to let them reach the top. Meanwhile, Kirito has learned the dark history of the Underworld and the true stakes of the battle they're fighting, and every step toward Alice brings him closer to an impossible decision...