books.google.com - Through Euclid's Window Leonard Mlodinow brilliantly and delightfully leads us on a journey through five revolutions in geometry, from the Greek concept of parallel lines to the latest notions of hyperspace. Here is an altogether new, refreshing, alternative history of math revealing how simple questions...https://books.google.com/books/about/Euclid_s_Window.html?id=GHY6VM3NsIwC&utm_source=gb-gplus-shareEuclid's Window
