Infinite Dendrogram Novel Volume 18 was written by Sakon Kaidou and illustrated by Taiki.

Ray and his new alliance, Death Period, are preparing for a major dueling event when they suddenly meet some surprising new recruits! As the clan grows even larger, it might be time for them to find a home of their own. Luckily for them, Count Gideon appears with a most unexpected offer in mind...

At the same time, Sechs and his coconspirators deep in the gaol are putting the final touches on a plan more heinous than any before. The past and present converge to reveal a long-held secret known only to the King of Destruction...and the King of Crime!