can i study only with study material for upsc exams

Prepare for general study book you can prefer tata macgraw hill or spectrum book , Maths book arihant publication , or 6-10 class ncert books , Read CSR magazine purchase any GK book for last 1 year and also read CSR magazine updae current information , visit civilserviceindia.com for other informat

Self Study is always good, but you need some guideline, how should you study, which portion of course is more critical and so many things. Group study is also more beneficial.