Download all the books for UPSC Civil Services Preparation.
Daily Quiz 2015 : https://inspiredforias.wordpress.com/downloads/daily-quiz-2015/
Environmental Studies: https://inspiredforias.wordpress.com/downloads/environment/
Indian Economy: https://inspiredforias.wordpress.com/downloads/indian-economy/
These books are collected from various resources from internet.I do not own copyrights for books .If any one have copyright issues and objections about books,inbox me.