Blogger Rose Aune says the following of Walter Foster:
I love my Art instruction books. One of my favorites is Watercolor by Duane R. Light from Walter Foster Publishing, Inc.. I like to work with pen and ink with a Watercolor wash. This design was first drawn on paper and then traced onto transparent vellum. I then inked in the design and applied the watercolor washes over the pen and ink drawing.
Thanks for the mention, Rose!