Ranganatha Ramayanamu

Sri Ranganatha Ramayanamu (శ్రీ రంగనాథ రామాయణము) is one of the most famous adaptions of the Valmiki "Ramayana" in Telugu, a Dravidian language spoken by the people of Andhra Pradesh and Telangana. Telugu has a very rich literary tradition, starting in the 11th century A.D. Although there are more than forty adaptions of the Valmiki "Ramayana" which are partly or completely in Telugu, only four adaptions have covered the entire theme of the original epic. They are Ranganatha Ramayana, "Bhaskar Ramayana", "Molla Ramayana", and "Ramayana Kalpavriksham".
"Ranganatha Ramayana" was written by the poet Ranganatha—also known as Gona Budda Reddy—between 1300 and 1310 A.D. This "Ramayana" was composed in 17,290 couplets (in Dwipada metre). This meter is lyrical and can either be recited like the Valmiki "Ramayana" (written in Anustupa metre) or sung like the "Ramcharitmanas" (written in Doha-Chaupai). It is quite popular with both scholars and illiterates.
Structure.
Although Ranganatha follows the theme of the Valmiki "Ramayana", he still made changes in some incidents which effects the course of events.
The theme of the "Ranganatha Ramayana" has been classified under seven cantos.
Blessing of Squirrel.
Ranganatha added some significant incidents to make the theme more natural and reliable. For example, when the bridge was built, a squirrel thinks that it should help Sri Rama to achieve his end; it dips in the sea water, rolls down in the sand and gets rid of the sand in the middle of the rocks under construction. Knowing this, Sri Rama blesses squirrel for its devotion and draws three lines on its back with his fingers. The three white lines on the back of squirrels are supposed to have come into existence in this way.