Can you tell me about the Yoga practitioner who came to see Baba in Chapter 23?

Certainly. Chapter 23 recounts the story of a practitioner of Yoga (Yogabhyasi) who was well-studied in texts like the Yoga Shastras of Patanjali. Despite his knowledge, he was unable to achieve Samadhi (intense meditation). Believing that "Maharaj Sai is a King of Yogis," he came to the Masjid with Nanasaheb Chandorkar, hoping that Baba's grace would remove his spiritual blockages. However, as he arrived for darshan with this high expectation, the first thing he saw was Sai Baba casually eating bread (bhakar) with onions, a very ordinary sight that contrasted sharply with his image of a great yogi.