The text says Sai Baba left his body. Does this mean he is gone and can no longer help his followers?

No, the text strongly refutes the idea that Sai Baba is gone. While it acknowledges that some say he "left the body," it immediately questions this by asking, "Who will believe these words?" Chapter 43 explains that Baba, a great Yogi, could die at will and chose to merge himself into the unmanifest by burning his body in the "fire of Yoga." Crucially, it states that he "stayed in the hearts of the devotees" and "always keeps the devotees awake." The author concludes that this beginningless and endless Sai fills the entire world and will never truly fall to birth and death, remaining a protector for his followers.