Where can i buy second hand books in Jaipur

I want CBSE/ NCERT class 11 and 12 books of 1. CS with python by Sumit Arora 2. Informatics Practices by Sumit Arora I want theae two books at cheaper rate as new books are costly. I live near Patrika Gate. Does anyone know some stores nearby where i can get those books. Or, if anyone had that books and no longer need them pls pass on to me. I have to prepare for KVS PGT Computer Science exam and need those.