religious book ramayana

the meaning of ramayana is the lord ramas history.the lord rama is the avatar of lord vishnu to kill the bad.that is to kill devils like ravana.as he is a brahmin with his meditation he make lord shiva to come and ask a boon that he should rule sri lanka.as sri lanka was not there  yet,lord shiva made a place below the india and made ravana as ruler.so he also became  kshatriya