Cancer immunology is transforming the landscape of oncology. This volume explores how the immune system interacts with tumors and how these insights are shaping the future of treatment. From global perspectives, such as the challenges of immunotherapy in Sub-Saharan Africa, to the molecular mechanisms of immune escape and the predictive value of biomarkers, readers are guided through the fundamentals of a rapidly advancing field. The book also examines the tumor microenvironment and the role of the microbiome, revealing their influence on shaping therapy outcomes. Clinical insights emerge through focused discussions on gliomas, melanoma, and liver cancer, demonstrating how immunology translates into therapeutic opportunities. Finally, the volume highlights the frontier of innovation, with chapters on mRNA vaccines and oncolytic viruses pointing toward the next generation of therapies. This collection offers both knowledge and inspiration, showing that cancer immunology is not only a field of research but also a pathway to innovation, resilience, and hope.