The present book entitled "Second Anglo-Mysore War, 1780-1784" attempts to review the causes, course and results of the war based on the contemporary records kept preserved in the archival repository of Tamil Nadu. The British had to wage four wars with Mysore, three with the Marathas, two with the Sikhs besides a few more with other powers, in order to establish their rule in India. Among these wars the Second Anglo-Mysore War was unique in the sense that it was fought at a time when the foundation of British rule was shaken to its base by the formidable confederacy of the principal local powers, Mysore, Marathas and the Nizam. It was also a time when England was embroiled in a war with her colonies in America and their allies the French, Spaniards, and the Dutch. While the English fought all other wars in their enemies' territories the Second Mysore War was fought practically in their territory, of which two third came under the control of Hyder, depriving them of their own resources. Though the Marathas and the Sikhs inflicted a few defeats on the English in their wars, those defeats were not as humiliating as Baillie's or Braithwaite's in the Second Mysore War. In spite of their victories over Hyder, the English were unable to reap the benefits and were mostly on the defensive. Even the death of Hyder in the midst of war had not brought any change in their position and before long they were forced by circumstances to ask for peace from Tipu Sultan.