This book has been written for B.Sc. Physics and M.Sc Physics students at various Indian Universities. The book covers the Alagappa University, Karaikudi's recommended course curriculum. We were inspired to write the book by the students' enthusiasm for the topic of "Introduction to Solid State Physics."  With a modern perspective, proper attention has been taken in dealing with the issue. At the end of each unit, a huge number of questions and problems have been provided. Students should make an effort to address them effectively in order to have a better comprehension of the subject.  It is clear and easy to read the text. Both regular students and top students should like this book. The students' exam performance would improve, while at the same time, their intellectual interest would increase. This book is divided into six units. The first unit discusses bonds in solids. The crystal structures and crystals diffractions are discussed in detail in the next unit, which includes detailed experiments. The third section discusses the conduction and dielectric materials. The magnetic properties and its classifications are given in chapter four. Semiconductors are discussed in detail in the fifth unit. The super conductivity and its features are discussed in the final unit.  We would warmly accept and highly value any useful comments you have on how to make the book better.