8 books in series

Sword Art Online

Sword Art Online is a 8-book series with 8 primary works first released in 2009 with contributions by Reki Kawahara.

Sword Art Online 1: Aincrad
Sword Art Online: Aincrad
Sword Art Online 7: Mother's Rosary
Sword Art Online 8: Early and Late
Sword Art Online 16: Alicization Exploding
Sword Art Online 17: Alicization Awakening
Sword Art Online 19: Moon Cradle
Sword Art Online 21 (light novel): Unital Ring I