The eagerly awaited fourth edition of "Euclidian and Non-Euclidian Geometries" will provide students with an overview of both classic and hyperbolic geometries, whilst also placing the work of key mathematicians and philosophers in a historical context. Including coverage on geometric transformations, modes of the hyperbolic planes and pseudospheres, and augmented by review notes and essay topics, the fourth edition will be an outstanding accompaniment to any geometry course.