Geometry and the Imagination (Ams Chelsea Publishing) by Hilbert, D., Cohn-Vossen, S.

This remarkable book has endured as a true masterpiece of mathematical exposition. There are few mathematics books that are still so widely read and continue to have so much to offer―even after more than half a century has passed! The book is overflowing with mathematical ideas, which are always explained clearly and elegantly, and above all, with penetrating insight. It is a joy to read, both for beginners and experienced mathematicians.nn“Hilbert and Cohn-Vossen” is full of interesting facts, many of which you wish you had known before. Itx27s also likely that you have heard those facts before, but surely wondered where they could be found.