Tulsidas (1511-1623) was an Indian writer. He wrote many books. His most famous book is the "Ramacharitamanasa". This book was written in a language called Awadhi, a dialect of Hindi. The book tells the story of Lord Rama and his war and victory over Ravana, king of Lanka. Rama fought for his wife Sita and brought her back from Lanka to Ayodhya.