What is the stated purpose and origin of the book 'Sai Leela' as detailed in Chapter 52?

According to Chapter 52, the book 'Sai Leela', also known as the Satcharitra, was written to remember the experiences Sai Baba gave to His devotees while He was in His physical body. The text describes it as a supremely holy work containing a 'sacrificial session of the stories of His true character.' The chapter further explains that the inspiration for the book came after Sai departed to His own abode, based on the fame and stories He Himself had narrated. It is presented as a guide that provides enlightenment for both this world and the next.