Textbook in PDF format Provides a comprehensive exploration of the fundamental principles and phenomena governing the behavior of solids, unraveling the world of crystals, semiconductors, and magnetic materials with clarity and depth. This indispensable book equips readers with the knowledge to understand and appreciate the remarkable properties and applications of materials that shape modern technology and our understanding of the physical world. In its updated edition, this book has been extensively revised on a chapter by chapter basis. Some new chapters are also added