This a collection of articles based on research conducted on Sri Lankan patients with urinary calculi. The epidemiology, aetiology, symptomatology and managements strategies are documented taking into consideration the characteristics which are unique to the urinary stones in the Asian region. New insights into the differences from the standard knowledge imparted from western world text books are highlighted. This is a useful reference book for those who wish to learn about urinary stone disease in the developing world. The findings described are very relevant for patient care in the developing world especially in Asia.