Which is the best book for IAS Mains exam? Tagged: study material for ias exams This topic has 1 reply, 2 voices, and was last updated 4 years, 10 months ago by deeptiaggarwal. Viewing 2 posts - 1 through 2 (of 2 total) Author Posts February 13, 2020 at 5:24 pm #2280 nisha royParticipant best book for IAS Mains exam? February 15, 2020 at 3:31 pm #2288 deeptiaggarwalParticipant Rau’s IAS Mains Compass booklet for different subjects are the best book for ias mains exam preparations. Author Posts Viewing 2 posts - 1 through 2 (of 2 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In