Rama Gita is part of Ramayana and in it Bhagavan Sri Ram
answers philosophical questions of brother Lakshman. You can download the
English translation of the text in pdf format for free. Rama Gita is found in
Chapter V of the Uttara Khanda of Ramayana and in Brahmanda Purana. In it
Bhagvan Sri Ram teaches about Brahman and ways to win over worldly attachments.