Based on the photo below and the website where I found it, Russell Stutler is definitely a sketchbook addict.

His website is a great resource for anyone who is interested in sketching on the go– there are articles on tools like waterbrushes and assorted sketchbook brands, and tips on how to use them in the field. And his own artwork is incredible, as you can see below:

If you are ready to lose yourself in pleasurable browsing for a while, be sure to visit Russell Stutler’s Sketchbook Home.