Accel World Novel Volume 22 is written by Reki Kawahara.

Despite their grueling battle and narrow victory over Oscillatory Universe, Nega Nebulus was unable to get any hard evidence of the connection between the White Legion and the Acceleration Research Society...or so they thought. Thanks to a key exchange captured by Chocolat Puppeter's replay card, they've got all the proof they need! Let the fourth Meeting of the Seven Kings begin!