Dr. D. Rock Britto is a Professor of Community Medicine with over 11 years of academic and clinical experience across leading medical institutions in South India. He completed his MBBS from Madurai Medical College, Madurai (2004-2010) and his MD in Community Medicine from St. John's Medical College, Bangalore (2010-2015). He is a recognized resource person for Research Methodology and Biostatistics workshops conducted by the Tamil Nadu Dr. MGR Medical University. He is known for his YouTube channel, "SPM & Research with Dr Rock Britto", focusing on research, BCBR exams, and Community Medicine. His passion for research methodology and medical education has become more than a profession—it is a calling he pursues with wholehearted dedication. Dr. Neethu George conceptualized this book, and along with Dr. Balaji S M, they worked meticulously on making the final draft of this book.