This text focuses on the practical aspects of crystal structure analysis, and provides the necessary conceptual framework for understanding and applying the technique. By choosing an approach that avoids undue emphasis on the mathematics involved, the book gives practical advice on topics such as growing crystals, solving and refining structures, and understanding and using the results. The technique described is a core experimental method in modern structuralchemistry, and plays an ever more important role in the careers of final-year undergraduates, graduate students, postdoctoral and academic staff in chemistry.