I've heard about Sai Baba curing ailments. Can you tell me about the time he cured a devotee's chronic asthma?

Certainly. Chapter 51 recounts the story of a devotee named Balaram, who had been suffering from chronic asthma for six years. During a visit, Baba held out his 'chillim' and signaled for Balaram to smoke it. Despite not being a smoker, Balaram took one puff as prasad. From that moment, his severe asthma vanished and never returned. The text notes that this cure was as effective as a mantra. As a profound final sign, Balaram experienced a single, sudden fit of coughing on the very day that Baba later gave up His body.