• 'Saikathabhuvil' (poem), 1982.
• 'Sareerarasathanthram' (Human Body Chemistry), 1985.
• Vilapakavyaprasthanam,' (Elegy), 1986.
• 'Bharatheeya Sahithyam' (Indian Literature) (Literary History, The World We Live In Series, No. 14), 1987.
• 'Viswasahithyam (World literature) (literary history, the world we live in series, No. 13), 1988.
• 'Nidhidweep' (Shorter Retold version of Treasure Island), 1988.
• 'Gulliver's Travels' (Shorter Retold version of Gulliver's Travels), 1989.
• 'Namaskaram Namaskarame' (Study - Criticism), June 1991.
• 'Kavikalum Kadhakalum' (Poets and Stories) (Children's Literature), 1992.
• Velichathilekku'' (Towards Light) (Neo- Literate Literature Book 1), 1992. (Tamil translation: Oliye Nokki, April 1993).
• 'Ballalakaviyude Bhoja Prabandham' (Ballalakavi's Bhoja Prabandham)
• (Translated with Prof. R. Vasudevan Potti), 1993.
• N. 'Krishna Pillai' (Biography), 1993.
• 'Onathinte Kadha' (The Story of Onam) (Navasakshara Literature 28), 1994.
• 'Sisu Geethangal' (Nursary Rhymes) (Children's Literature), 1996.
• 'Nadanpattinte Koode' (With folk songs) (Navasakshara Literature), 1997.
• 'Padayanipattu, Nathonathayum Mattum' (study), 1998.
• 'N. Krishna Pillai (Monograph), 1999 (Tamil translation 2005, Hindi 2013, Kannada 2015, English 2021).
• 'Manasinte Visappum Malayalathinte Ruchiyum' (The Hunger of the Mind and the Taste of Malayalam) (Children's Literature), 2000.
• Iythihyangalum Sahithyavimarsavum'' Legends and Literary Criticism (Study), 2000.
• 'Utsavakavu' (poetry), 2001.
• 'Jnanappana' (commentary - study), 2002.
• 'Nadnapattilninnu Nadakathilekku' (From Folk Song to Drama) (Study), 2002.
• Gurujanangale Priyappettavare'', (New Literacy Literature), 2004.
• 'Annam Munnam' (Neo- Literate Literature), 2005.
• 'Aadam Paadam' (Children's Literature), 2005.
• 'Kadha Parayum Kavikal' (Children's Literature), 2005.
• Delhi 'Malayalam Certificate Course' (Textbook), 2006.
• Delhi 'Malayalam Diploma Course' (Textbook), 2006.
• Delhi 'Malayalam Higher Diploma Course' (Textbook), 2006.
• 'Kerala Varma Muthal Chemmanam Vare ' (Study - Criticism), 2007.
• 'Kuttikalkku Randu Viswothara Krithikal' (Children's Literature), 2007.
• 'Bhashayum Bharanabhashayum' (Study), 2008.
• 'Titi Mammen Kadha Parayunnu' (Children's Literature), 2008.
• 'Mahakavi Idayaranmula K.M. Varghese' (Biography), 2008.
• 'Malayalasahithyacharithram Muthirnnakuttikalkku' (Sahitya Charitram), 2009.
• 'Mukhaprasadam' (Philosophy), 2009.
• N. Krishna Pillai: Patanasahyam'. (Encyclopedia), 2009.
• 'Ente Gramangal' (Memoirs), 2010.
• 'Anubhavam Guru' (Children's Literature), 2010.
• 'Sabdasasthrathinte Sreemukham' (Study - Criticism), 2010.
• 'Swathanthryathinte Swargam' (The Heaven of Freedom) (Study), 2010.
• 'Kerala Varma' (Biography), 2010.
• 'Ente Malayalam Prasanothari' (Children's Literature), 2010.
• 'Malayalavum Madhyamangalum' (Study - Criticism), 2011.
• N. Krishna Pillai, C.N. Sreekantan Nair, Thoppil Bhasi' (Short Biographies), 2011.
• P.K. Parameswaran Nair' (Biography), 2011.
• 'Malayalasamskaram: Laghu Vijnana Kosam' (Encyclopedia), 2012.
• Aathmanjanathinte Vazhikal (Philosophy), 2012.
• 'M.K. Joseph: Iniyennu Inganeyoral' (Biography), 2012.
• N. Krishna Pillai' (Short Biography), 2013.
• Greece-Roman Ithihasakadhakal(Mythology, Compilation-Study), 2013.
• 'Samskarathinte Verukal' (Study – Criticism), 2014.
• 'Malayalam Marakkunna Malayalee' (Study- Criticism), 2014.
• P.K. Parameswaran Nair' (Short Biography), 2014.
• 'Malayalathinte Aakasham ' (Study - Criticism), 2014.
• 'Ezhumatoorinte Balakavithakal' (Children's Literature), 2014.
• 'Rajatha Rekhakal' (Prof. N. Krishna Pillai Foundation- History), 2014.
• 'Aruvippurathinappuram' (Study – Criticism), 2016.
• Nallakaryam- Subhashithangal'' (Philosophy), 2017.
• 'Krishnayanam' (Drama), 2017.
• 'Irelandile Rajnandinikku ' (Travelogue), 2018.
• 'Ezhumatoorinte Upanyasangalum Abhimukhangalum' (Criticism), 2018.
• 'Ezhumatoorinte Thiranjedutha Prabandhangal (Criticism), 2018.
• 'Bharanabhasha-Adisthanarekhakal' (Study), 2018.
• Iythihyangal Sahithyathil' (Legends in Literature) (Children's Literature), 2019.
• 'Romile Vedasreekku' (Travelogue), 2020.
• 'Ezhumatoorinte Avatharikakal' (Study-Criticism), 2020.
• Nalla Vakku: Subhashithangal (Philosophy), 2020.
• Nalla Chintha: Subhashithangal'' (Philosophy), 2020.
• 'Ezhumatoorinte Kavithakal' (Collection of Poems), 2021.
• N. Krishna Pillai: Ente Gurunadhan' (Study and Criticism), 2021.
• 'Irish Kadhakal' (Irish Stories) (translation), 2021.
• 'Raghunanda Thara Vilikkunnu' (Travelogue), 2021.
• 'Priyappetta Kunjoonju sarinu' (Memoirs), 2022.
• 'Ezhumatoorinte Grandhaniroopanangal' (Criticism-Study), 2022.
• 'Lalitham Malayalam-Malayalam Certificate Course Padavali', 2022
• Kathukal: Snehamudrakal (Memoirs), 2022.
• 'Ramayanamritam' (Studies), 2023.
• 'Ezhumatoorinte Navasakshrasahitya Krithikal (Neo-Literate Literature), 2023.
• 'Lalitham Malayalam-Malayalam Diploma Course Padavali', 2023.
• 'Bharathadarsanam' (Philosophy), 2023.
• 'Ezhumatoorinte Balasahithya Krithikal, 2023.

• N. Krishna Pillayum Samskarikarangavum', (with V. Chandrababu and Kavadiyar Ramachandran), 1987.
• Anubhavangal Abhimathangal (Interview with N. Krishna Pillai), 1988.
• 'Niroopanarangam' (Studies, N. Krishna Pillai), 1989.
• 'Priyasmaranakal' (Memoirs, N. Krishna Pillai), 1989.
• 'Aakapporul Thedi' (Studies, N. Krishna Pillai), 1990.
• N. Krishna Pillayude Lakhu Natakangal', 1990.
• 'Ithilkanniyum Koonankurukkum' (Short plays, N. Krishna Pillai), 1990.
• N. Krishna Pillayude Natakachinthakal', 1990.
• 'Adiverukal' (Studies, N. Krishna Pillai), 1991.
• 'Kalidasan Muthal ONV Vare' (Studies, N. Krishna Pillai), 1992.
• 'Anandakuttante Thiranjedutha Krithikal', 1995.
• 'Anandakuttante Krithikal Kurekkoodi', 2001.
• 'Bharanabhasha' (articles), 2003.
• 'Attukal Kavithamritham', 2007.
• N. Krishna Pillayude Natakangal Sampoornam, 2008.
• 'Aksharamudra' (ONV Studies), 2011.
• 'Aadyakala Balakavithakal 2015.
• 'Enthanu Natakam (Study, N. Krishna Pillai), 2012.
• Viswasapramanangal: Veekshanaviharangal D. Babupaul), 2013.
• 'Padyamanjari' (Children's Poems selected by Mahakavi Ullur), 2013.
• N. Krishna Pillayude Prabandhangal Sampoornam, 2014.
• N. Krishna Pillayude Natakalokam (Studies, Many), 2014.
• N. Krishna Pillayude Balasahithyakrithikal, 2014.
• N. Krishna Pillayude Sahithyavimarsam (Studies, Many), 2016.
• 'Manmaranja Saradhikal (Memoirs, Many), 2016.
• N. Krishna Pillai: Vyakthiyum Sahithyakaranum (Studies, Many), 2018.
• N. Krishna Pilla Malayala Kavithayil'' (Poems, Many) 2019.
• 'Malayala Natakam' (Studies, Many), 2019.
• 'N. Krishna Pillai: A Tribute' (Studies by eminent Scholars), 2020.
• N. Krishna Pillayude Gurushreshtar' (Studies, Many), 2022.
• 'N. Krishna Pillayude Balasahithya Krithikal-Patanangal (Studies, Many), 2022.

• Malayalathinte Perunthachan: Dr. Ezhumattoor Rajarajavarmayude Ezhuthum Jeevithavum (Biography) by Dr. T.R. Jayakumari, R. Vinodkumar, 2020.
• Ezhumattoorinu Snehaadaram - Sapthathi Kavyopaharam - Edited by Dr. C. Udayakala, 2023.