"Geometric Crystallography" deals with the fundamentals of crystallography, with a primary focus on elementary geometric aspects. The book extensively covers the description of crystal lattices, placing special emphasis on the classification of these lattices, lattice reduction methods, and the indexing of lattice directions and planes. Crystal lattices serve as the foundational structure upon which the study of crystals is built, and understanding their geometric intricacies is crucial in crystallography. Therefore, "Geometric Crystallography" serves as a comprehensive guide to the geometric aspects of crystallography, equipping readers with the necessary knowledge to describe crystal lattices, classify them, employ lattice reduction methods, index lattice directions and planes, comprehend crystal symmetry groups, and utilize Fourier transformation in the analysis of crystal structures.