How was Sai Baba involved in the creation of his own life story, and what did he promise the author?

According to the narrative in chapter 2, Sai Baba was not just a passive subject but the prime mover behind the writing of his life story. Feeling compassion for the author's impatient mind, Sai Baba granted permission and encouragement, stating, "I myself shall write my own story!" He promised his full help, viewing the author as merely a pretext or instrument for the work. Baba's condition for this assistance was that the author must dissolve his ego and surrender it at His feet. In return, Sai promised not only to assist with the story but to serve the author in all ways in his home, ensuring the work would be accomplished by the One to whom it truly belongs.