Why do old buildings and furniture simply look right? George R. Walker and Jim Tolpin answer that in By Hand & Eye: the pre-industrial world designed by proportion, not measurement, using ratios worked out by hand and eye rather than dimensions from a plan.
The book teaches that design language, historical and practical, so you can generate your own well-proportioned work instead of copying someone else's. Published by Lost Art Press, it changes how you see everything you build afterward.