Kimetsu no Yaiba Novelization 6

Demon Slayer Novelization: Breaking into the Infinity Castle! Shinobu's Thoughts Arc (鬼滅の刃 ノベライズ ~無限城突入! しのぶの想い編~), written by Shuka Matsuda, is the sixth light novel based on the Kimetsu no Yaiba manga. The illustrations are created by Koyoharu Gotoge.

Synopsis
The Demon Slayer Corps initiates the "Hashira Training" to bolster the skills of the Demon Slayers and to cultivate the Hashira. However, the leader of the Corps, Kagaya, is confronted by Muzan, the Demon King! Furthermore, an account of Shinobu's clash with the Twelve Kizuki member, Doma, is also documented in its entirety!