To get new prospectus of year 2017-2018, you have to send D.D. of Rs. 500/- in favour of 'Bharatiya Vidya Bhavan' payable at New Delhi. You will receive the new prospectus along with the application form within a week by Speed Post.
However to understand details about different courses you can read old prospectus of year 2014-2015 by downloading it from this site. Content of Old Prospectus is similar to New Prospectus.