Recommended books for preparing for the UPSC Civil Services Examination include classics such as "Indian Polity" by Laxmikant, "Indian Economy" by Ramesh Singh, and "Introduction to the Constitution of India" by D. D. Basu. "Modern India" by Biswas covers history comprehensively, while "Current Affairs Yearly" provides updates on recent developments. Additionally, aspirants should consider reference materials relevant to their optional subjects and general studies. Reading newspapers and periodicals enhances awareness of current events, vital for both the preliminary and mains examinations.