I would suggest you to take admission at Vajiram and Ravi to prepare effectively for your IAS exam. The supportive teachers at the institute will help you at every step. Further, they also help you save time and efforts by providing you the notes with just the required study material. By going through these notes, you will be able to save time on reading a large number of books to cover the complete syllabus. They also provide online study material. So you can visit their site to check the details of postal study material for your IAS exam preparation.