Which are the most important book lists for the UPSC IAS prelim preparation? Tagged: study material for ias exams This topic has 0 replies, 1 voice, and was last updated 4 years, 12 months ago by nisha roy. Viewing 1 post (of 1 total) Author Posts November 25, 2019 at 3:49 pm #2119 nisha royParticipant important book lists for the UPSC IAS prelim 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