books.google.com - This comprehensive history traces the development of mathematical ideas and the careers of the mathematicians responsible for them. Originally published in 1972, it is now available as a three volume paperback edition. Volume 1 looks at the discipline's origins in Babylon and Egypt, the creation of geometry...http://books.google.com/books/about/Mathematical_Thought_from_Ancient_to_Mod.html?id=wKsYrT691yIC&q=ratio&utm_source=gb-gplus-shareMathematical Thought from Ancient to Modern Times: