According to Chapter 52 of the Sai Satcharitra, why was the book written and who was chosen to write it?

Chapter 52 explains that the book, referred to as "Sai Leela," was written to remember the experiences Sai Baba gave to His devotees while He was in His physical body. The text emphasizes that Sai himself inspired the work, choosing Hemadpant as the author. As stated in this chapter, despite having countless followers, Sai held Hemadpant's hand, who considered himself devoid of specialized knowledge and learning, and caused this true life story to be written. The purpose of this supremely holy text is to provide enlightenment for this world and the next for those who read the life story of their Guru.