I am in urgent need of following books for M.sc. Physics:
1. Optoelectronics by Ajoy K Ghatak
2. Optoelectronics by S. C. Gupta
3. Electronics by M. S. Tyagi
4. Solid State Physics by S. O. Pillai
5. Electronics by A.K. Srivastava
6. Electronics Fundamentals and Applications by Chattopadhyay

Please its urgent..