Why doesn't the book talk about my personal patron saint? Does this mean my devotion is misplaced?

The text does not suggest your devotion is misplaced. Instead, it encourages a broader perspective that transcends specific names. Chapter 19 explains that the essence of spirituality lies in undivided focus, referencing the Bhagavad Gita's promise that Govinda provides for those 'who think of Me with undivided attention.' The quality of your attention and love is what matters. The text narrates an experience where a devotee's simple resolve to chant 'Rama' brought immense peace, demonstrating that the power lies in the sincere thought itself, regardless of the specific form or name you venerate. Your devotion is powerful when offered with an undivided heart.