Significant historical texts for UPSC aspirants to study include key works like the Constitution of India, Gandhi's writings, and other foundational documents that provide insights into India's socio-political evolution. Additionally, texts like the Communal Award or writings by prominent leaders offer perspectives on India's struggles for independence and post-colonial policy formation. Familiarity with these documents not only enhances understanding of historical contexts but also equips candidates to appreciate contemporary political and social dynamics, ultimately enriching their examination responses.