In this fascinating study Martin Kemp illuminates the most fundamental aspect of Leonardo's work - how he thought visually. The pages of his notebooks teem with ideas and are unparalleled in the graphic work of any other thinker from any age. Extraordinary images from a wide variety of sources, some virtually unknown, are illuminated by large-scale models and sequences of innovative computer graphics designed to animate his thoughts. Leonardo never lost his awe of the wonders of natural design and this ground-breaking book communicates a comparable sense of wonder through the continued grandeur and freshness of Leonardo's incomparable vision.