Sword Art Online 21 (light novel)  (English, Paperback, Kawahara Reki)

It's been a month since Kirito and Asuna returned from the Underworld.Together again with Alice, who managed to secure a life in the real world, itshould've been happily ever after...But, as luck would have it, the three findthemselves involved in a VRMMO by the name of Unital Ring, and all their statshave been reset to level one! It's time for Kirito to put his experience to thetest in a genuine Survival MMO!