I was asked in a comment the other day what type of sketchbook I use...it's a square Holbein, spiral bound sketchbook. I have made my own as well..that's especially handy if you just adore a particular paper and want a specific size. I cut the paper to size and make a cover and back cover out of matboard. Then I take the bundle to a local copy store that does bindings and voila...a custom sketchbook. Make sure that they can handle a certain thickness to punch the binding through. You can then collage your covers or if you use a lighter colored matboard, paint right on there!