This book invites you on a systematic journey through the fascinating world of crystals and their symmetries. You will become familiar with the symmetry of external crystal forms (morphology) as well as their internal structure, and you will learn about all the symmetry elements necessary for the classification and description of crystal structures. The book explains the relationships in a very illustrative, non-mathematical way and is enhanced by clear, high-quality illustrations. Online materials accompany the book; for instance, 3D models that you can explore on your screen support the spatial understanding of crystal structures. After reading this work, you will not only know what a space group is and how to read the international tables for crystallography, but you will also understand crystallographic specifications in professional publications.