The book "Diagnostic Test as A Tool To Assess Diseases: A Comparison" offers a comprehensive analysis of the role of diagnostic tests in medical care, particularly in the context of urban and rural areas in Bangladesh. It examines the differences in the availability, cost, and reliability of diagnostic tests between the capital Dhaka and the suburb Kishorgonj. By collecting data from various healthcare facilities, including public and private clinics, a detailed comparison is made that highlights the challenges and privileges within the healthcare system. The authors Mahmudur Rahman, Kazi Jannat Ara, and Amina Khatun shed light on public perception and access to diagnostic tests, thereby contributing to a better understanding of health inequalities in the region.