The book contains the basic information about the superconductors like: 1. Definition of superconductors 2. critical temperature 3. critical magnetic field 4. Silsbee rule 5. Properties of superconductors 6. Meissner effect 7. Type 1 and Type 2 superconductors 8. London equations and flux penetration 9. Application of superconductors 10. BCS Theory of superconductivity