According to the text, how did the book 'Sai Leela' come to be written and what is its purpose?

Chapter 52 explains that the book "Sai Leela" was written to remember the experiences Sai Baba gave to His devotees while He was in His body. It is described as a supremely holy text containing the stories of His true character. The chapter states that Sai Baba Himself chose Hemadpant, who was devoid of specialized knowledge, held his hand, and caused this true life story to be written. Some of the fame and stories were even narrated by Sai with His own mouth for the disciples to hear. The ultimate purpose of reading this life story is to gain enlightenment for both this world and the next, as mentioned in Chapter 52.