please tell me which is better for iit coaching correspondence course or books for iit as i am planning to give iit 2009 (i am damn good at self study) along with my bsc physics (H) FROM STEPHENS preferably.

also tell me which correspondence course would be better in terms of its questions and explanation(it should be in depth) vmc or brilliant or any other

also if possible from where can i get free sample copy of various institute's corr. course