Sword Art Online Progressive 9 (light novel)

After clearing the seventh floor, Kirito is turned into a Civis Nocte, a vampire-like being with tremendous strength and a deadly weakness to sunlight. He, Asuna and their elf ally Kizmel go after the Fallen Elves who stole five sacred keys, and the chase takes them back down to the fourth floor. There they become caught up in an old feud between the elven races and learn the secrets of Viscount Yofilis.

• Brand: Hachette / Yen Press
• Officially Licensed: Yes
• Author/Artist: Reki Kawahara, illustrated by abec