According to the text, how does the Shri Sai Satcharitra itself act as a continuation of Sai's presence after his physical incarnation ended?

Chapter 45 explains that when the work of the incarnation was complete, Sai Baba's physical form vanished as he brought his incarnation to an end. However, the chapter offers a powerful alternative for devotees by stating that this book, the Shri Sai Satcharitra, serves as His literary form. As mentioned in Chapter 45, this literary manifestation will provide remembrance of Him at every step. The text also notes that listening to these stories allows the mind to attain a unique and indescribable peace through deep concentration, thereby ensuring Sai's presence continues to be felt.