From Land of the Cauvery to the Land of Brahmaputra is an extensive account of S. Manoharan's life, detailing his experiences and reflections as a civil servant in India. It covers various phases of his career, from his initial years of training to his tenure in different roles, including his time as Deputy Commissioner, Chief Electoral Officer, and his experiences during his deputation in the Union Ministries of Commerce, Steel and Water resources at varying periods in his thirty-five-year long career as a civil servant. Manoharan began writing his memoirs in 2023, reflecting on his career in the Indian Administrative Service (IAS) starting from his post-graduation in 1973 and joining the IAS two years later. He faced challenges adapting to different cultures and languages in the enchanting regions of Assam and Meghalaya but overcame them through dedication and perseverance. Manoharan's memoir highlights his commitment to public service, his ability to navigate complex administrative challenges, and his contributions to various sectors.