Gurusagaram (Eternity of Grace) is a 1987 novel written by O. V. Vijayan. The novel is a spiritual odyssey into the human psyche. It differs in language, vision and characterisation from Vijayan's earlier works such as Khasakkinte Itihasam and Dharmapuranam. It won many major awards including the Kendra Sahitya Akademi Award, Kerala Sahitya Akademi Award and Vayalar Award.