File:Toaru Majutsu no Index Light Novel v21 cover.jpg

Summary
Toaru Majutsu no Index Light Novel Volume 21 Cover scan.

"The cover for Volume 21. At this point, it became clear the Russia story would cover 3 volumes, so I decided to put the 3 main guys and their primary partner on the covers. ...So for Volume 21 it was Hamazura-kun and Takitsubo-san. I originally thought about putting privateer helicopters and tanks or maybe a group of Academy City powered suits in the background, but I decided Super Mugino would have the greatest impact!" ―Haimura Kiyotaka