Author Dr. Olsen is one of the leading experts on the Golden Section, and Professor of Philosophy and Religion at College of Central Florida in Ocala, Florida. His new book, out in Spring 2013, is Divine Proportion: the Mathematical Perfection of the Universe. The Golden Section: Nature\'s Greatest Secret is a concise and useful history book on the Golden Section - also known as the Golden Ratio and Golden Mean. The Golden Section is a line segment divided into two parts, such that the ratio of the short portion to the longer portion is equal to the ratio of the longer portion to the whole. It is one of the most elegant and beautiful ratios of the mathematical universe because of its combination of elegance and simplicity - hence the divine nature of its name.  Drawing on art, architecture, philosophy, nature, mathematics, geometry, and music - and beautifully illustrated with all manner of images- this mathematical history book will tell the story of this remarkable construct and its wide ranging impact on civilization and the natural world.This history book is one of many art books available from the National Gallery, which include art history books, art exhibition catalogues and gift books.