This annotated bibliography presents a comprehensive overview of five research papers focused on sustainable tourism. The papers explore various global contexts, including Nepal's trekking tourism, Vietnam's tourism prospects, a Spanish heritage town facing overtourism, and responsible tourism in Yelagiri, India. The research methodologies employed include both qualitative and quantitative approaches, with data collected through interviews and surveys. The papers examine stakeholder perceptions, ethical tourist behavior, and the diffusion of innovation in the context of tourism. The findings highlight the importance of understanding and implementing sustainable practices to mitigate negative impacts and ensure the long-term viability of the tourism industry. The bibliography emphasizes the need for awareness among stakeholders, including tour operators, governments, and tourists, to promote responsible tourism and protect the environment. It underscores the critical role of sustainable tourism in balancing economic development, social well-being, and environmental conservation.