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Books about Unnayi:
Unnayi warrier (Makers of Indian literature) by Pi Narayanakkuruppa (1997)
Unnayi Varier's Nalacaritam: With performance manual based on Kalamandalam Krishnan Nair's stage version by Unnayivariyar/Translated by Sudha Gopalakrishnan (Jan 1, 2001)
Unnayi Warrirute Nalacharitham Aattakadha by Prof.Panmana Ramachandran Nair (Jan 1, 2012)