Sundara Kanda (The Book of beauty) is the fourth book of the Valmiki Ramayana, which is one of the two great epic poems of India, the other being the Mahabharata. The book consists of 68 sargas (sometimes translated as chapters or cantos) of Sanskrit verse.
The sundara kanda forms the heart of Valmiki’s Ramayana and consists of a detailed, vivid account of Hanuman’s adventures. After learning about Sita, Hanuman assumes a gargantuan form and makes a colossal leap across the ocean to Lanka. Here, Hanuman explores the demon’s city and spies on Ravana. He locates Sita in ashoka grove, who is wooed and threatened by Ravana and his rakshasis to marry Ravana. He reassures her, giving Rama’s signet ring as a sign of good faith. He offers to carry Sita back to Rama, however she refuses, reluctant to allow herself to be touched by a male other than her husband. She says that Rama himself must come and avenge the insult of her abduction.
Hanuman then wreaks havoc in Lanka by destroying trees and buildings, and killing Ravana’s warriors. He allows himself to be captured and produced before Ravana. He gives a bold lecture to Ravana to release Sita. He is condemned and his tail is set on fire, but he escapes his bonds and, leaping from roof to roof, sets fire to Ravana’s citadel and makes the giant leap back from the island. The joyous search party returns to Kishkindha with the news.