History optional This topic has 0 replies, 1 voice, and was last updated 8 years, 2 months ago by Ankitrox11. Viewing 1 post (of 1 total) Author Posts July 25, 2016 at 11:30 am #1336 Ankitrox11Participant Can anyone please suggest me the must read books for history optional including study materials , and best coaching(if necessary), i am going to appear for UPSC CSE – 2018 Author Posts Viewing 1 post (of 1 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In