What defines a Guru's biography, and who are some historical figures known for writing them in the Marathi tradition?

Chapter 0 defines a Guru's biography as a reliable and true account detailing the Guru's incarnation, life stages from childhood to old age, wonderful plays (Leelas), incomparable miracles, and the works of their incarnation. The practice of writing such biographies is ancient, even being mentioned in the Narada Purana. In the Marathi literary tradition, the preface highlights two famous poets who excelled in this form of service. Maharaj Shri Mahipati is noted for his works Shri Bhaktalilamrut and Shri Santalilamrut, and Shri Dasganu Maharaj is mentioned for his three Marathi works, all of which were written in the Ovi meter.