If Emerald thinks on it, Joyride should be here by tomorrow morning, which means he has one more night sleeping in the chapel, which means he could sneak in and get the book then.
Emerald shakes his head, instead he asks Dead Eye how he joined Lord Sepulcher's army.
"I was a sniper in the Haunchhock Army. That was quite a long time ago though, and I barely remember anything about it. Heck, I don't even really remember what I looked like when I was alive!" Dead Eye says with a laugh.