Dynamic Symmetry: The Greek Vase

Hambidge's lesson course on root rectangles and the whirling square, the system he built around the golden section. Step by step, with the constructions drawn out.

Jay Hambidge

The sequel to Nature's Harmonic Unity, working through spirals, ellipses, catenary curves and the golden series in nature, art and architecture. Heavy on diagrams and measurement.

Samuel Colman and C. Arthur Coan

Cook tracks the spiral through shells, horns, plants, staircases and Leonardo's notebooks. Over four hundred illustrations, and an unusually level-headed discussion of where the phi claims hold and where they do not.

Theodore Andrea Cook