Written by a professor of architecture, this book is a primer on drawing as practiced in various design professions, including architecture, landscape architecture, interior design, as well as much that is even applicable today in Computer Aided Design (CAD) and related fields. Covering not just the technical aspects of drawing, but also, much like Edward Tufte's The Visual Display of Quanitative Information, it looks at the organization of visual material through the cognitive efforts of the artist. Also the best general guide to drawing conventions and mechanics that I've ever come across.