The book seems to imply that not mentioning a saint is irrelevant because Sai is the 'real' author and speaker. Can you explain this concept of non-duality and how it applies here?

Yes, this idea is central to the book's concluding message. Chapter 50 explains this by stating, 'In this, there is no one other than Sai who makes the words speak. He alone is the thing to be heard, the act of hearing, and the listener; let this oneness not falter.' This is the concept of non-duality, or 'Sahaj-sthiti,' where the distinction between 'I' and 'You' dissolves. In this state, the reader, the text, and the divine subject become one. Therefore, the absence of a specific saint's name is secondary because the entire work is considered a direct expression of Sai. The ultimate request is to attain this 'non-dual devotion,' which purifies the heart and transcends the need for specific labels or stories.