This is an undergraduate textbook that reveals the intricaciesof geometry. The approach used is that a geometry is a spacetogether with a set of transformations of that space (as argued byKlein in his Erlangen programme). The authors explore variousgeometries: affine, projective, inversive, non-Euclidean andspherical. In each case the key results are explained carefully,and the relationships between the geometries are discussed. Thisrichly illustrated and clearly written text includes full solutionsto over 200 problems, and is suitable both for undergraduatecourses on geometry and as a resource for self study.
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