TRUPTI DHODMISE AIR-16 , UPSC CSE PSIR notes. https://drive.google.com/drive/mobile/folders/13PblX-zuS9Av5zGdsIRrzZnWl-J2ZeBS?fbclid=IwAR31JBL--5eG4l91kQ7cJldW9QEqLhlwcaMpWrEFnWnED1vFm52ZtdsDSHY UPSC CIVIL SERVICES EXAMINATION PSIR OPTIONAL TOPPERS NOTES.  For latest/ Updated PSIR PYQs Book - Click