Here it is.
I had this fabric in my stash. They were curtains that I had turned into a slipcover for a love-seat and then abandoned when I had gotten bored with it.
Aren't you glad someone invented Velcro? It's just super.
The nook cover is stabilized with thick fusible interfacing. It's normally for crafts or for sturdy purses, so it fitted my project perfectly. It's just fabric, bias tape, some rick rack, 1/4" elastic, 3/4" velcro, and some thread and interfacing. The bias tape stretched, which isn't surprising since that's it's purpose, and the zig zag stitching didn't turn out beautifully in contrast on the rick rack, but all in all, I was pleased and it functions perfectly.