Geometry: Euclid and Beyond (Undergraduate Texts in Mathematics)In recent years, I have been teaching a junior senior level course on the classi cal geometries. This book has grown out of that teaching experience. I assume only high school geometry and some abstract algebra. The course begins in Chapter 1 with a critical examination of Euclid's Elements. Students are expected to read concurrently Books I IV of Euclid's text, which must be obtained sepa rately. The remainder of the book is an exploration of