According to the preface, what specific literary work is recommended for building a community around Sai Baba through study and Parayans?

The preface strongly recommends the Shri Sai Satcharita for those wishing to engage in community-building practices like Parayans. As detailed in Chapter 0, this "sweet, inspirational, and grace-filled biography" was written by the devotee Shri Govind Raghunath alias Annasaheb Dabholkar about Shri Sai Baba. It is presented as a modern, comprehensive, and poetic work perfectly suitable for Parayans and Saptahs. The text highlights that, apart from the older Guru Charitra, there is no other work written in such detail, making the Shri Sai Satcharita a central text for the community of Sai devotees to study and gather around.