As promised the photo of the said book cover.
The cover is knitted in an Aaron weight yarn, I cast on 80 stitches and continued in Knit 1, Purl 1 until it measured the size of book it was to cover. The other one was done in same yarn but Knit 2, Purl 2. If you make it too long just fold it down to make a cuff. You could also use it to cover a kindle or Ipad to stop the screens from scratching.
What do you think?