What were Sai Baba's specific instructions to the author about writing His biography, and what role was the author's ego supposed to play?

Sai Baba granted permission to create a collection of His stories, but with a profound condition. According to Chapter 2, He instructed the author to completely dissolve his ego and surrender it at Baba's feet. Sai Baba stated, "He is merely a pretext; I myself shall write my own story!" He promised that if the author could eliminate his ego, He would not only provide full assistance with the book but would also serve the author in all ways. Baba explained that once the ego is gone, He Himself would enter with 'I-ness' and write with His own hand, making the author just an instrument for a work that truly belongs to the One.