Big Sculpture for Little- Stone Coating

I don't see why the three volumes in this set could not be a single volume priced at a more appropriate $30. The layout, graphics and editing are amateurish for so pricey a trilogy.The author has had some experience, but has not refined his techniques or experimented with alternative methods of sculpture creation before writing the books. Some of his writing seemed to be merely a report on trying some of this and some of that to see if anything might work. For $90, I can do that myself.