Web Novel Volume 15

This is the fifteenth volume of the Mushoku Tensei web novel. This covers the Summoning Arc.

Synopsis
CASTLE IN THE SKY

Nanahoshi, Rudeus, and the rest of their group take a trip to Perugius’s mysterious floating fortress, seeking adventure and a once-in-a-lifetime chance to learn new magic. What they find instead is disaster as one of their number is struck down by a deadly illness. How far will Rudeus go to save a dear friend’s life?

Chapters

 * Chapter 144: Floating Fortress
 * Chapter 145: An Audience with Perugius
 * Chapter 146: The Past and a Curse, Summoning, and Jealousy
 * Chapter 147: Lament
 * Chapter 148: Return to the Demon Continent
 * Chapter 149: Search for Kishirika
 * Chapter 150: An Audience with the Immortal Demon King
 * Chapter 151: Showdown with the Immortal Demon King
 * Chapter 152: A Day in the Floating Fortress
 * Chapter 153: Turning Point (Part 4)
 * Chapter 154: An End and a Beginning