Many of his Works are Written under the Pen Name Cheri which is Derived from the Name of his Family Cheriyil in Kollam District in South India.

He Started his Career as a Playwright and Journalist and was Associated with the Famous Theater Group in South India called Kalanilayam [2]

In a literary Career Spanning Over 45 years ,He had written 16 Novels,25 Dramas and 19 Radio plays and several lyrics for Malayalam movies [3]

His Songs for the Movie Thaalappoly (1977)[4] was the biggest hit of the year [5]

He had written screenplays for 20 feature Films, Directed by Veteran Film makers M.Krishnan Nair, Madhu , Cross Belt Mani and M.Mani.

Viswanath Worked as the Chief Editor for the Malayalam Dailies Thaniniram and Yeenadu for 45 years.

He is the Father of Biju Viswanath Award Winning International Film maker and Priya Prakash, Veena Player.

Plays

Screenplays

Radioplays

• Ezhu Sundara Rathrikal 1979 (Seven Wonderful Nights)
• Sasthram Prathikuttil1980 (Science in the Accused Stand)
• Porutham1980 (Harmony)
• Tharavadinte Manam1981 (Family Honour)
• Siksha 1981(Punishement)
• Punarvivaham1983 (Remarriage)
• Nandi Veendum Varilla1986 (Thanks I Wont Come Again)
• Doctor,Collector, Engineer 1986
• Packup 1992

Kadhaprasangam

• Neelasari (Blue sari) 1969(Kollam Babu)
• Marble Sundari (Marble Beauty) 1971 (Kundara Soman)
• Swayamvaram (Marriage) 1972 (Kundara Soman)
• Punarjanmam (Rebirth) 1973(Kundara Soman)
• Christ 1975 (Chenganoor Thankachan)
• Neelavelicham (Blue Light) 1976 (Viswambharam)
• Devatha (Goddess) 1977 (Chitaranjan Bhagavatar)

Novels

• Avivahithayaya Bharya 1962 (Unmarried Wife)
• Ladies Hostel 1963
• Snehabandam 1965 (Love Affair)
• Vivahasammanam 1966 (Wedding Gift)
• Kamadhenu 1967 (Wish Cow)
• Kanaljalam 1968(Mirage)
• Randam Madhuvidhu 1970 (Second Honey Moon)
• Daivam Veetil Vannirunnu 1971 (God Came to House)
• Neelasari 1972 (Blue Sari)
• Melottu ozhukumma Puzha 1985 (The River That flows Upwards)