Biomarkers in Cancer Detection - From Screening to Improving Treatment Outcomes presents a focused overview of the role of cancer biomarkers in revolutionizing early detection, diagnosis, monitoring, and precision oncology. The present book discusses molecular, circulating, and inflammatory markers, multi-omics, and artificial intelligence-assisted techniques, as well as the shift from biomarker discovery to clinical application, while specifically highlighting the potential of liquid biopsy, microRNAs, multi-cancer early detection, organ-specific screening, and accessible blood-based predictive models. The book is designed for researchers, clinicians, educators, and students and provides a timely synthesis of current evidence and emerging directions to enhance detection and improve patient outcomes.