How did the book 'Sai Leela' or the Satcharitra come to be written, according to the final chapter?

According to Chapter 52, the book 'Sai Leela' was written to remember the experiences Sai Baba gave to His devotees while He was in His body. The text emphasizes that Sai Baba Himself chose Hemadpant for this task, despite Hemadpant considering himself devoid of specialized knowledge. It's poetically described that Sai held Hemadpant's hand and caused this true life story to be written. Furthermore, some of the fame and stories within the book were narrated by Sai with His own mouth for disciples to hear, and the inspiration for the book came after He departed to His own abode.