If the book doesn't mention my patron saint, what advice does it offer for someone whose devotion is directed towards a different spiritual figure than Sai Baba?

The book provides a beautiful example of how devotion to other figures is not only accepted but encouraged by a true Guru. In Chapter 19, the author himself decides to undertake a continuous chanting of the name of Rama. He makes a "firm resolve in the mind" and, upon setting out for darshan, he is greeted by a sweet song with the lyrics, "I have found the collyrium of Guru’s grace, my brother; I do not believe in anything without Rama." This experience demonstrates that the Guru's grace supports sincere devotion, regardless of the name or form it takes. Sai Baba's encouragement shows that nurturing a "wave of good thoughts," as the chapter advises, is the true goal, and any divine name can be the focus of that devotion.