These three volumes constitute the first complete English translation of Felix Klein's seminal series "Elementarmathematik vom höheren Standpunkte aus". "Complete" has a twofold meaning here: First, there now exists a translation of volume III into English, while until today the only translation had been into Chinese. Second, the English versions of volume I and II had omitted several, even extended parts of the original, while we now present a complete revised translation into modern English.

First Part: The Simplest Geometric Formations. I. Line-Segment, Area, Volume as Relative Quantities.- II. The Grassmannian Determinant Principle for the Plane.- III. The Grassmannian Principle for Space.- IV. Classification of the Elementary Configurations of Space According to their Behaviour under Transformation of Rectangular Coordinates.- V. Higher Configurations.- Part Two: Geometric Transformations. I. Affine Transformations.- II. Projective Transformations.- III. Higher Point Transformations.- IV. Transformations with Change of Space Element.- V. Theory of the Imaginary.- Part Three: Systematic Discussion of Geometry and its Foundations. I. The Systematic Discussion.- II. Foundations of Geometry.- Final Chapter: Observations about the Teaching of Geometry. I. The Teaching in England.- II. The Teaching in France.- III.The Teaching in Italy.- IV. Teaching in Germany.- Appendix I.- Appendix II.- Index of Names.- Index of Contents.