Clever wall design

Kinda reminds me of the texture used for Asriel's final form's wings in Undertale: http://66.media.tumblr.com/d6ca300eb0a4c659e3f4f37bc045cece/tumblr_nxjzdlVsUV1uiwpaqo1_1280.png

Nice book

Wow: amazing job, guy, my compliments!