Euler's Gem

David Richeson's Euler's Gem does an outstanding job of explaining serious mathematics to a general audience. . . . The book succeeds at showing the reader a lot of attractive mathematics with a well-chosen level of technical detail. -Jeremy L. Martin, Notices of the AMS It was a pleasure reading this book, and I recommend it to everyone who is not afraid of mathematical arguments and has ever wondered what this field of `rubbersheet geometry' is about. You will not be disappointed. -Jeanine Daems, Mathematical Intelligencer This is an excellent book about a great man and a timeless formula. -Charles Ashbacher, Journal of Recreational Mathematics The author has achieved a remarkable feat, introducing a naive reader to a rich history without compromising the insights and without leaving out a delicious detail. . . . An awe-inspiring experience. -Choice