Hlavics argues that sketching is a set of decisions, not a talent. He breaks it into a small number of things you’re actually choosing — line weight, edge, value, what to include — and shows how varying just those changes everything. The demonstrations are the strength: The same subject drawn several ways to show what each decision entails. It’s aimed at designers and architects who need to think on paper fast rather than at people making finished pictures, and it’s straight about the fact that most sketching problems really are seeing problems.
The Exceptionally Simple Theory of Sketching