This is titled as a workbook, but it also combines all the info from the book of the same title. I bought both, but I think you could use either one without the other. This one provides places to draw the exercises, the regular book requires that you provide your own paper.
I had used an older edition many years ago. Wore it out. This edition incorporates ideas from the field of brain plasticity, making it even easier for everyone to believe that they can learn to draw.