I have a 6 page article in the Art of Watercolor magazine from in the 16th issue (October-November 2014). Here is a PDF. It's fun to be in a magazine, and there is a lot of other good work in it as well. I use a lot of drafting tape and toothbrush in my work, I tried to show an example of how I use it in thew article. I always forget to mention I learned the technique from Alain Gavin, who teaches in Evanston, IL.
I keep painting images of these towers on spindly columns, which would fall over within a day if someone attempted to build them. The idea came from a trip to Yellowstone, were I ran across a vein of columnar basalt along the road. Basalt is a volcanic rock that forms into hexagonal columns as it cools. The expose rock looks like a dense series of columns holding up a huge mass of rock. I like the scale and variety of textures, which I transformed into a row of towers, but I like the depth and uneasy balance created by seeing through the columns, hence the spindliness. I spend so much time drawing things that need to make sense in reality, that I purposely created something impossible.