What is the ultimate resolution presented in Chapter 53 regarding the completion of the book's summary, and who is credited with its authorship?

Chapter 53 resolves the issue of the missing summary by attributing its eventual creation to divine will rather than human effort. The new author, after expressing his own limitations and praying for inspiration, concludes that he is merely an instrument for a higher power. He states, "Sai, the breaker of obstacles (Vakratunda), will be the one to write this summary. His glory is immense; my mouth is merely an instrument." Therefore, while a human author physically wrote the words, the chapter makes it clear that the true author is considered to be Sai Baba himself, working through the devotee to complete the sacred text.