My guru is not named in this book. Does this mean my path is considered invalid by these teachings?

Not at all. The absence of a specific name does not invalidate your path or your devotion. The teachings within the Shri Sai Satcharitra aim to break down barriers, not create new ones. Chapter 19 explains that the 'sense of difference like 'I and Thou' is the wall between Guru and disciple.' The ultimate goal is non-duality. The book emphasizes a universal Master, teaching 'Allah-Malik' (God is the Master), suggesting all sincere paths lead to Him. The most crucial element is your own faith and practice. As Chapter 19 reveals, 'As the action, so the hearing; as the practice, so the benefit.' Your devotion, when practiced with an undivided heart, is what matters and what will bring you the experience of happiness and contentment.