What is the primary purpose of the book "Sai Leela" as described in Chapter 52?

Chapter 52 explains that the book "Sai Leela" was written to remember and preserve the experiences that Sai Baba gave to His devotees while He was in His physical body. The text describes this work as supremely holy, containing the stories of His true character which provide enlightenment for both this world and the next. It is also mentioned in this chapter that Hemadpant was specifically chosen by Sai to author this true life story, with Baba holding his hand and guiding him despite his self-perceived lack of specialized knowledge.