The Elements of Dynamic Symmetry

Hambidge measures Greek pottery and argues the shapes follow root-two and golden section rectangles. Whether or not you accept the conclusion, the analysis is careful and fully illustrated.

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