I learned how to install a zipper the right way and I am very pleased with the results. At first I was going for a simple zipped pouch, but then I added a cut little tab and lining and then I made it book sized and what do you know? I've got a Nook cover!
Stats: body and lining 7" x 9" (2 of each), zipper 7", 1/4" seam allowance, tab can be whatever size you live. Sew it all together and wham, bam, thank you maam – you've got a Nook cover!