*Snake ran both of his hands over the walls. He felt the screens across from the doorway they came from. He also felt something with his feet. He picked it up and it felt like a small book. No braille on the pages, alas. If he had to take a guess, it was instructions on how to use the screens that hadn't been there the first time they'd wandered through the maze.*

So you definitely need light to see this. *He handed Heiji the manual and turned his head toward their pursuers.* That poses a bit of a problem.