How does Chapter 49 explain the author's motivation for writing the Sai Satcharita and Sai Baba's role in the process?

According to Chapter 49, the author was directly prompted by Sai Baba to write the Satcharita for the benefit of His devotees and for the author's own self-interest. The text states that Sai is the true composer and writer, and without His inspiration, the work would be dry. As mentioned in Chapter 49, the merciful Sainath entered the author's mind, got His own book written, and fulfilled the author's desires. If the author ever forgot the narrative, Sai would provide the remembrance at the right time, making it clear that Sai himself orchestrated the creation of the book.