Are there specific books mentioned that are ideal for creating a study group or community around Sai Baba's life?

Yes, the texts explicitly identify a key work for this purpose. Chapter 0 introduces the "sweet, inspirational, and grace-filled biography" of Sai Baba written by the late devotee Shri Govind Raghunath alias Annasaheb Dabholkar. This work, titled Shri Sai Satcharita, is described as a detailed, comprehensive, and famous biography suitable for Parayans and Saptahs. It is presented as one of only two such detailed Guru biographies found in Maharashtra, making it the primary recommended text for forming a community dedicated to studying Sai Baba's life and teachings.