Lyric here. I love working with fabric and I love sketching. My sketchbooks want to be pretty on the outside - even if they are a mess on the inside.
If you'd like to make a sketchbook slipcover you'll need just enough fabric to wrap your book like a gift (mine is quilted to batting although that is not required.) You'll also need inside fabric that's just a little longer than the fabric you'll use for the outside of the slipcover.
And because I had just enough fabric left over I made a little pencil case. Melanie Testa has a tutorial here so you can make one of those too if you wish.