Resources available for understanding international relations in UPSC include a variety of academic textbooks, research journals, and online platforms. Key publications such as Foreign Affairs, The Economist, and government reports can provide insights into global affairs. Additionally, following reliable news sources enhances understanding of current events. Online platforms like MOOCs and dedicated forums can provide structured learning experiences. Engaging in discussions on current affairs with peers further deepens understanding and critically analyzes international dynamics relevant to UPSC.