This 5-Volume, Encyclopaedic Study Of India S North-East Is The Result Of The Author S 11 Years Of Service Extended Over Three Tenures In The Region, Followed By 6 Years Of Library Research After His Retirement. Being The First Of Its Kind, Given Its Contents And Sheer Size, Over 2,500 Pages, It Is A Unique Book.Writing On The North-East Is Not An Easy Exercise, Given Its Diversity (Ethnic, Racial, Religious And Linguistic), Size, History And Geography. If India Is Microcosmic World, The North-East Is Microcosmic India. Of The 5,653 Communities In India, 653 Are Tribal Of Which The 213 Are Indigenous To The North-East. Of The 213, 111 Are Found In Arunachal Pradesh Alone. Illumined By An Equally Amazing Linguistic Diversity, It Is Home To 325 Of The 1,652 Languages Spoken In India. Yet Again, North-East S Total Population Of 3,84,95,089 (2001) Constitutes 2.69 Per Cent Of India S 1,02,70,15,247, While Its Area Of 2,55,088 Sq Km Is 7.75 Per Cent Of India S 32,87,263 Sq Km.