Madath Thekkepaattu Vasudevan Narayanan Nair (15 July 1933 – 25 December 2024) was an Indian author, lecturer, screenplay writer, filmmaker and literary statesman. He was a prolific and versatile writer in modern Malayalam literature, and was one of the masters of post-Independence Indian literature. Randamoozham, which retells the story of the Mahabharata from the point of view of Bhimasena, is widely credited as his masterpiece.

At the age of 20, as a chemistry undergraduate, he won the prize for the best short story in Malayalam for Valarthumrigangal at World Short Story Competition jointly conducted by New York Herald Tribune, Hindustan Times, and Mathrubhumi. His first major novel, Naalukettu (The Legacy), written at the age of 23, won the Kerala Sahitya Akademi Award in 1958. His other novels include Manju (Mist), Kaalam (Time), Asuravithu (The Demon Seed), and Randamoozham (The Second Turn). The emotional experiences of his early days went into his novels, and most of his works are oriented towards the basic Malayalam family structure and culture. His three novels set in traditional tharavads in Kerala are Naalukettu, Asuravithu, and Kaalam.