How was Sai Baba involved in the creation of his life story, and what promises did He make to the author?

According to Chapter 2, Sai Baba assured the author of His full support, stating that the author was merely a pretext and that He Himself would write His own story to fulfill the devotee's wish. He promised to provide full assistance to anyone who dissolves their ego and surrenders at His feet. Sai Baba encouraged the author to keep a record of the stories, news, and experiences, promising, "I myself shall enter with 'I-ness' and write with my own hand." He also stated that He would serve the author in all ways in his home, not just with the story itself.